
Defender
Cement
★★★★★
Rim Billiton
Introduction
Cement is a 5-star character in Arknights. Cement's class is Defender. Faction: Rim Billiton.
On the combined Arknights tier list Cement is C tier, 353rd of the 410 characters ranked, from where 2 community tier lists put Cement.
What Cement does
A
Defender who gets tougher the longer she's out, with 15% Physical damage reduction that doubles after 35 seconds deployed.
Structural Support stacks 20 layers of +21% DEF that peel off one per hit, and
Stratum Groundbreaker hits everything in range for 280% ATK with two charges.
Profile
Cement is a female Zalak. Her birthday is Oct 25, and she stands 155cm tall. Cement is voiced by Daisy in Chinese, Dani Chambers in English, Kozue Yuuki in Japanese, and Seo Eun-bi in Korean. 科学 drew her.
Stories
9Basic Info
[Code Name] Cement
[Gender] Female
[Combat Experience] N/A
[Place of Birth] Rim Billiton
[Date of Birth] Oct 25
[Race] Zalak
[Height] 155cm
[Infection Status]
Medical tests have confirmed that no infection is present.
Physical Exam
[Physical Strength] Excellent
[Mobility] Normal
[Physical Resilience] Excellent
[Tactical Acumen] Standard
[Combat Skill] Normal
[Originium Arts Assimilation] Standard
Profile
Shana Moleman, leader of Rim Billiton's 'Shana's Construction Crew.' Proficient in engineering techniques such as boring, tunneling, and laying concrete, she first came into contact with our Engineering Department during the renovation of a nomadic operation platform. Now, as a nonresident engineering consultant, she participates in relevant Rhodes Island missions under the codename 'Cement.'
Clinical Analysis
Imaging tests reveal clear, normal outlines of internal organs, and no abnormal shadows have been detected. Originium granules have not been detected in the circulatory system and there is no sign of infection. At this time, this operator is believed to be uninfected.
[Cell-Originium Assimilation] 0%
Operator Cement shows no signs of Originium infection.
[Blood Originium-Crystal Density] 0.15u/L
Operator Cement works in mineshafts for extended periods of time and frequently comes into contact with Originium dust. Although she has not been infected thanks to her adequate protective equipment, it is nonetheless recommended that she periodically undergoes thorough medical examinations.
'By the way, that shield of hers. If it's filled with concrete inside, what exactly is that supposed to be like?'
'Gavial tried lifting it the other day. She had to use both hands.'
'Wow, sounds like Cement's actually pretty strong.'
Archive File 1
On the day Cement reported to the landship, the first impression of the HR operator in charge of onboarding her was that she possesses an extraordinary sense of smell. Per his account, the moment she stepped into the office, she immediately pinched her nose and frowned. At first, he thought our new Rim Billitonian friend must have had concerns with the agreement's terms, but before he could explain, Cement seemed to have made up her mind and said, 'Um... I think there might be something rotten in here. Probably in the third drawer on the left.' There, the HR operator found an almost finished pack of cookies wrapped with a rubber band... Relevant records show that while in narrow, humid mineshafts, Cement was once able to discern abnormalities in the strata from just the smell. Thanks to this, the workers on her team evacuated, repoured the structure's concrete, and alleviated the shaft's hidden hazard in time. For this, she earned everyone's trust.
On the night of her arrival, Operator Cement received invitations from a number of departments and clubs, including the Rhodes Island Cafeteria, the Procurement Department, the Convalescent Garden, the Wine-Tasting Society that Tequila is a part of, the environmental sample analysis team that Purestream is a part of, and more. Cement took each request seriously and responded to all of them. According to Podenco, when she visited the Convalescent Garden, she was able to remember and identify the aromas of more than a dozen kinds of flowers within a few short minutes. She also disappointingly noted that although clusters of flowers like the Garden can be found in Rim Billiton's forests and wildernesses, when there is dust in the air, even the flowers appeared as gray and colorless as the large machines that hummed and roared all hours of the day there. At the very end, Cement revealed that she had an interest in perfuming and thanked Lena and Podenco for their invitation in spite of the fact that she could not stay on the Rhodes Island landship for long because of her busy schedule.
Not long after, Cement returned to Rim Billiton.
Archive File 2
[Engineering Operator Work Files]
C02, Rhodes Island Bridge emergency maintenance; voluntarily participated in the project...
C07, Engineering Department step drill set retrofit. Placement deviation can be brought to within 2cm, penetrable strata hardness increased by two, and overall efficiency increased by 30%.
C12, Rhodes Island Secondary Cabin System retrofit. Four revisions were requested during the verification process of the construction blueprints. Already confirmed with Closure; determined feasible.
During their routine review of the construction logs, the Engineering Department discovered that although Cement is not stationed aboard Rhodes Island, she has already amended the work files roughly a dozen times. Regarding her skills in construction and maintenance techniques such as boring, tunneling, and laying concrete, a number of our senior operators unanimously provided the same evaluation: 'exceptional.' All year round, Cement toils away in mining and construction sites across Rim Billiton. Although she lacks systematic knowledge of engineering theory, her abundant on-field experience and skills in machine retrofitting allow her to accurately determine the feasibility of blueprints, as well as the particularities of rock formations and the durability of construction materials. In addition, any equipment that she retrofits can be used in more complicated and difficult construction environments with their functionality and accuracy assured.
'Drills, work shields, wind gauges, high precision tape measures... These tools are how we make a living. This is a tough line of work. We can only put food on the table if we have what it takes, and it's only by getting ourselves up to snuff that we finally gained a foothold in this business. Then, and only then, can we start talking about other things.'
'Noise? Hm, it is a huge problem. What can we do to reduce noise while improving efficiency? Mod headphones? That isn't really my forte...' Despite the fact that she has been confidently reassuring us and telling us to relax, Cement's face turns red—a rarely seen occurrence.
Archive File 3
'Shana's Construction Crew' is a small construction team with less than fifty employees, with its main revenue source being subcontract work from Rim Billiton PLC's large-scale construction projects. During negotiations, Cement often repeatedly emphasizes that the rights her workers deserve during construction must be reflected in the contract— Of course, she also likes to reiterate that they must retain the right to go over, adjust, or modify all blueprints; and that their supervisors must not be able to interfere with the construction process using vague excuses; and that all payments and other compensations must be made on time. Although these demands are nothing unusual, such a conscientious, self-assertive attitude is hardly favorable for an entrepreneur...
However, the data we've collected show that Shana's Construction Crew has enjoyed decent business development in Rim Billiton. The reason, as Cement herself explains, is 'technique.' Their technique is what has allowed them to remain competitive. The construction crew has maintained a zero accident record since its formation, its projects have all exceeded acceptable standards upon inspection, and redoes have been extremely few and far between. In just a few short years, Shana's Construction Crew has quickly gone from a hotheaded no-name company to a highly-rated, reputable business contractor.
Cement has revealed to us that Shana's Construction Crew is currently gradually expanding and attempting to branch out to other lines of business. They have started to take on projects other than mining and construction, such as prospecting and exploratory mining for foreign tech companies, exploratory boring in special environments such as icefields, and providing technological support to tunneling groups... While discussing our partnership's direction with Engineering, Cement even indiscreetly suggested to Closure that she would like Rhodes Island to pull some strings for her to head to Columbia for business exchange and further studies.
'What's Columbia's Great Expansion really like? How are Rim Billiton's workers different from workers elsewhere?
'No matter where we are and what it is we do, the work that us laborers put in is always meaningful.'
Archive File 4
Any operator who has ever been around Cement has most likely heard her talk about her dreams: She wants Rim Billiton to become a place where there are no more mining accidents and where all workers can talk about their present and future with optimism.
Cement comes from an average family of Rim Billitonian miners. Her father was a labor contractor who took on secondary construction projects, and as a kid, she followed him to and from the mines. There, she saw the workers gathered around a boiling pot underneath simple awnings, emptying bottles of Originium Slug beer one after another, their faces still covered in dirt. She saw her father skillfully mediate with safety officers over their nitpicky routine inspections at the bar next to the mineshafts. She saw her father screen a movie outside, for the workers who couldn't make it home for the New Year; a gunshot in the movie woke her up, but she went back to sleep after her father gave her a lolly. She saw the disaster caused by the strata structure's failure, and how her father was shortchanged during the compensation negotiations because the engineering crew comprised many Infected; unwilling to see the victims' next of kin fall to hard times, he used his own savings to foot their remunerations... Soon thereafter, the crew was dissolved for financial reasons.
When asked why she didn't learn from her father's mistake and continued in this line of work, Cement did not give an explanation at all. Instead, she asked with confusion, 'Why not?'
Of course, Cement isn't someone who is overly optimistic or stubborn. Once, a sudden rainstorm interrupted a tunneling project. While everyone else engaged in idle chit-chat at the portable shed, she instead calmly expressed her thoughts on the current situation—
Most of Shana's Construction Crew's staff are young workers who had the technical expertise to begin with, and the remaining members are showing clear improvement under her urging and devoted tutorage. However, looking at the big picture in all of Rim Billiton, a country where the mining platforms' roars can be heard just about anywhere, most of those who work in the mines are lacking in talent. They may never get the chance to operate high-precision machinery and can only work in strenuous physical labor. Many of them may not even know how to read and write. All they can do is keep their heads down and travel to and from the mines day after day, perhaps never to leave again...
'I admit that it's too optimistic, maybe even naive, to count on our professional abilities keeping us indispensable to the mines' owners and safe from their bullying...
'There's nothing I can do to change the mineral resources underground or the politics aboveground, but I still have to do something.
'As long as there's still a tiny shred of possibility for change.'
Promotion Record
[Special Logs]
1. Infrared sensor and shield photography module set
Operator Cement made the following purchase order application to the Engineering Department for installation on her work shield's construction recorder.
2. Mints
Remarks: Must be mint-flavored. No weird, fruity experiments. Simple sweetness, a very effective stimulant.
Some operators have seen Cement dropping her candy onto the ground by accident only to pick it up, brush away the dust, and put it in her mouth.
7. Iron Impressions
Investigation shows that Iron Impressions is a magazine funded and published by the workers of a few Rim Billitonian mines, and it features regular columns such as 'Major Affairs,' 'Policies Deconstructed,' 'Glimpses of Foreign Events,' 'Workmen's Pen,' 'Unmissable Humor.' After Cement subscribed to the magazine for Shana's Construction Crew, she personally contacted the editorial team to express her willingness to provide regular monetary support.
Additional note: Fifteen issues of Iron Impressions have been published since its inaugural issue, and the magazine has switched from a monthly format to a bi-weekly format since. Its latest issue's 'Workmen's Pen' featured a semi-documentary novel titled Carrot Roots Must Be Deep about a miner who mistakes a sand beast that entered the mines for a phantom. In the complicated mineshaft terrain, the miner chases the beast, eventually digging eight kilometers into the earth. The story is penned by Shana Moleman, and although the writing style is on the naive side, it is a very readable piece.
Stats
- HP25th of 4553,642
- ATK27th of 4551,002
- DEF16th of 455628
- RES0
- Block1
- DP cost418th of 44632
- Redeploy70s
- Attack interval238th of 4551.6s
At Elite 2, level 80, before trust, potentials and modules. Each bar is measured against the highest value in the Arknights roster, and the place is out of every character with that stat, lowest first for DP cost, Redeploy and Attack interval.
By promotion
- Elite 0 Lv. 1HP: 1534ATK: 460DEF: 252RES: 0Block: 1DP: 28Redeploy: 70Interval: 1.6
- Elite 0 Lv. 50HP: 2131ATK: 648DEF: 371RES: 0Block: 1DP: 28Redeploy: 70Interval: 1.6
- Elite 1 Lv. 70HP: 2804ATK: 831DEF: 502RES: 0Block: 1DP: 30Redeploy: 70Interval: 1.6
- Elite 2 Lv. 80HP: 3642ATK: 1002DEF: 628RES: 0Block: 1DP: 32Redeploy: 70Interval: 1.6
Base values before trust, potentials and modules. Full trust adds ATK +40, DEF +60.
Trait
- Only restores SP when blocking enemies
Skills
2
Stratum Groundbreaker
Manual trigger · Auto recovery · Unlocks at Elite 0LevelDeals 280% ATK as damage to all enemies within Attack Range Can store 2 charges
- SP cost
- 6
- Initial SP
- 3
- Charges
- 2

Structural Support
Manual trigger · Auto recovery · Unlocks at Elite 1LevelGains 20 stacks of a buff that grants 21% DEF per stack (a stack is consumed each time damage is taken) Can manually deactivate skill
- SP cost
- 40
- Initial SP
- 20
- Duration
- 60s
Talents
1Blueprint Corrections
- Elite 1
- Gains 6% Physical damage reduction; effect doubles after being deployed for 35 seconds
- Elite 1 · Potential 5
- Gains 9% (+3%) Physical damage reduction; effect doubles after being deployed for 35 seconds
- Elite 2
- Gains 12% Physical damage reduction; effect doubles after being deployed for 35 seconds
- Elite 2 · Potential 5
- Gains 15% (+3%) Physical damage reduction; effect doubles after being deployed for 35 seconds
Potentials
- Potential 2
- DP Cost -1
- Potential 3
- Redeployment Time -4 sec
- Potential 4
- DEF +27
- Potential 5
- Improves First Talent
- Potential 6
- DP Cost -1
Modules
1
Engineering Recorder (HES-X)
Unlocks at Elite 2 Lv. 50StageStatsTraitTalent- Stage 1Stats: ATK +25, DEF +50Trait: SP recovery is slowed except when blocking enemies
- Stage 2Stats: ATK +42, DEF +75Trait: SP recovery is slowed except when blocking enemiesTalent: Gains 14% Physical damage reduction; effect doubles after being deployed for 35 seconds
- Stage 3Stats: ATK +57, DEF +100Trait: SP recovery is slowed except when blocking enemiesTalent: Gains 16% Physical damage reduction; effect doubles after being deployed for 35 seconds
To unlock
- Complete a total of 5 battles; You must deploy your own Cement, and unleash Structural Support at least 1 time in each battle
- Clear Invitation to Wine IW-EX-6 with a 3-star rating; You must deploy your own Cement, and cannot include any other Defender Operators as members
Module record
'Found it, bloody hell. Would've been an earful from the boss if I came in tomorrow without. Say, what point does she have giving us all one of these... works recorder thingym'bobs?'
'You think I'd have a clue? Yours's been on the whole time. See how you lost it in the first place, maybe?'
'Sure.'
[Display View] Before clocking out, a worker tosses the recorder aside as he changes.
'Hahah, my arse someone took it. You lost it your own silly self.'
'Shtum.'
[Display View] Not long after the worker leaves, Shana suddenly appears in the workplace.
'Wait, that's the boss, nah?'
[Display View] Shana checks over the equipment for wear and tear, tweaking any gummed-up specimens one by one. She stops before a drilling rig, and fishes out a notebook to write in.
'Y'know, it stumped me how our machines worked like such a charm without our tiny team having any maintenance people. S'pose the boss did all the work.'
'That's the Brooks' driller. Definitely had a bit of dullness digging up the rock the day before. They just kept on using it, but I guess the boss noticed straight away.'
'All our drills are her upgrades, after all. Better than anyone else's. She's the master here.'
[Display View] Shana moves onto inspecting the recent construction. At a part that's been finished, she ponders for a moment before bringing out her recorder and beginning to examine.
'I know what happened there. Gallen was wanting to give his family a call and rushed to finish. I thought something was off myself. Just was too busy with my own work to take a proper look in time.'
'Shh, listen to what she's saying. 'Concrete is 3cm too thin.' That would've been a hazard lurking. So she susses out the recorders to catch stuff like this.'
[Display View] Shana nonchalantly tears open a packet of mints, one of which accidentally falls onto the ground. She picks it up, blows off the dust, then pops it in her mouth like nothing happened.
'*sigh* Funny how she's always so breezy. Guess once she's down in the mines... she'd be like any of us.'
'Only met one other foreman as good as her in all my working life.'
'You did?'
'Yeah, middle-aged bloke. Didn't discriminate against us Infected, always brought his daughter to the site to eat with the crew. I would've gladly worked with him until retirement, but then one time a project he was on caught him. A potential safety hazard became an accident. Had to disband the whole construction crew after that.'
'Shame.'
'Been over ten years now, but I think I still vaguely remember his name. Was it... Moleman?'
'...Y'know, our boss's full name is, Shana Moleman.'
Base skills
2
Standardization α
Factory · Elite 0When this Operator is assigned to a Factory, productivity +15%

Tunnel Work
Factory · Elite 2When this Operator is assigned to a Factory, capacity limit +10 and Morale consumed per hour -0.25
Outfits
3
Elite 1
Default Outfit
Art by 科学

Elite 2
Default Outfit
Art by 科学

New Business
EPOQUE/XXXI
Art by 科学
Store
Voice lines
38Show all 38 lines
- Appointed as Assistant
- Don't stay cooped up in your office all the time, Doki. Why don't you come down to the mines with me one of these days?
- Talk 1
- Something smells moldy. Should be in the bottom left drawer. My nose is never wrong... Well, Doki, You should really deal with those documents before they pile up. If you just leave them like that, they're gonna get damp.
- Talk 2
- My drills are all souped up. They've got twice the impact, improved stability, and they pretty much can't jam. Anyway, I'm a pro when it comes to boring, tunneling, and laying concrete. If you've got any construction jobs like that, I'm your girl!
- Talk 3
- First, you check construction blueprints ahead of time. Second, you don't disrupt our work without a good reason. Third: You never, ever fall behind on your payments. That's the three principles Shana's Construction Crew uses to decide on projects. No exceptions, Doki, not even for Rhodes Island.
- Talk after Promotion 1
- Rim Billiton has more prospecting operation platforms than you can count, with tons of workers running around. You gotta know what you're doing to get anybody to listen to ya. I work hard to refine my skills, and I teach what I know to the gang. That's the way I do things... Yeah.
- Talk after Promotion 2
- We don't compromise on safety, even in barren mines with low output. Infected or not, so long as you work the mines, your rights oughta be guaranteed. I hope we never see another Billy mine accident. At the very least, I always make sure my projects stand up to inspection.
- Talk after Trust Increase 1
- Doctor, want a lolly? It's just a regular mint one. I always keep some in my pocket. Don't underestimate the power of a lolly, though. When there's dusty air all around you, a little sweetness can really calm you down.
- Talk after Trust Increase 2
- My dad always said that Columbia's Great Expansion marked the start of a new age. Now, the big corps pull in all different countries on big projects. Rim Billiton's ores really shine out there. But you know how things go, the taller the building, the more solid the foundations have to be. That's why the work we do is always meaningful, no matter the task.
- Talk after Trust Increase 3
- 'A Billy worker never sees the sun.' That's what my friends in the mines always say. The darkness down there swallows everything, work and life, past and future... I want to give people hope for the future, Doki, give them better lives. Easy enough to say, but there's lots of work to do. You'll lend a hand, won't you, Doki?
- Idle
- Alright, lads, day's done. Rest up now.
- Onboard
- Oh, so you're the Doctor everyone's talking about! I'm new in Engineering; foreman of Shana's Construction Crew out of Rim Billiton! Here's my business card.
- Watching Battle Record
- Nah yeah… If the mines just provided workers with recorders, it would save us so much hassle.
- Promotion 1
- I thought it was a joke when I got a new contract from HR. Not only did my pay go up, I get even more benefits... Thanks, Doki!
- Promotion 2
- If I ever get the chance, I want to go check out Columbia, see the Great Expansion with my own eyes and how their workers are different from ours in Rim Billiton... Doki, Rhodes Island works with a lot of big companies, right?
- Added to Squad
- Work, work! Hop to it now!
- Appointed as Squad Leader
- You all got your helmets on? Check again!
- Depart
- This shaft's got a complicated layout. Follow me.
- Begin Operation
- Ah! Why is my drill stuck?!
- Selecting Operator 1
- Hm…? What's that smell?
- Selecting Operator 2
- Relax, Doki, just show up at completion time.
- Deployment 1
- The blueprints check out. Let the construction work begin!
- Deployment 2
- Remember, max deviation for each drill hole is two centimeters!
- In Battle 1
- Oi! Stay focused when you're running that boring machine!
- In Battle 2
- A triple bright miner's lamp could make ya go blind!
- In Battle 3
- Move, or this cement's going right on your heads!
- In Battle 4
- Dig! Diiig! Diiiiiiig!
- 4-star Result
- Doki! We… We just wrapped up a huge project!
- 3-star Result
- When worker safety's on the line, you can't slip up for even a single second.
- Sub 3-star Result
- If you spot anything after construction's done, that's already too late. We need to find as many problems as we can in the design stage.
- Operation Failure
- Don't be glum, chum. Follow-up work is part of construction, too. Just leave it to me to take care of the reinforcement. Cheer up, Doki.
- Assigned to Facility
- Let's say Rhodes Island needs some dorms rebuilt, think you might hire Shana's Construction Crew? Hehe…
- Tap
- Eeek! Oh, it's you, Doki. Sorry, didn't notice you over the sound of the drill.
- Trust Tap
- Doki, can you hold this shield for me? Careful now, it's heavy. The inside there? That's concrete, baby.
- Title
- Arknights.
- New Year's blessing
- It's this time of year that workers with no way to get home gather in the open parts of the mine to screen movies. Watching the shiny, happy people up there, we all forget our worries for a while. Then a new day comes, and a new year begins.
- Greeting
- Hey, Doki! Here, a mint for ya.
- Birthday
- Happy birthday, Doki! Are you free today? The construction team just took on a new mining project, and the groundbreaking ceremony's today. Everyone will be so happy to see you there... What do ya say? I'll buy you lunch afterwards.
- Anniversary Celebration
- I know even a small project can call for a lot of workers. But I've never seen a place like Rhodes Island, with so many amazing people gathered together. What are you all trying to accomplish, Doki? Whatever it is, I can't wait to see it for myself, 'cause now I'm part of it too!
Upgrade costs
Open in the plannerPromotion
- Elite 1
Defender Chip ×4
Device ×3
Polyketon ×2
LMD ×20,000 - Elite 2
Defender Dualchip ×3
Manganese Trihydrate ×7
Grindstone ×13
LMD ×120,000
Skill levels
- Lv. 2
Skill Summary - 1 ×4 - Lv. 3
Skill Summary - 1 ×4
Sugar Substitute ×7 - Lv. 4
Skill Summary - 2 ×6
Polyester ×3 - Lv. 5
Skill Summary - 2 ×6
Oriron ×4 - Lv. 6
Skill Summary - 2 ×6
Compound Cutting Fluid ×4 - Lv. 7
Skill Summary - 3 ×6
Grindstone ×3
Orirock Cluster ×3
Mastery: Stratum Groundbreaker
- M1
Skill Summary - 3 ×5
RMA70-24 ×3
Sugar Pack ×3 - M2
Skill Summary - 3 ×6
Polymerized Gel ×3
Incandescent Alloy Block ×5 - M3
Skill Summary - 3 ×10
Polymerization Preparation ×4
White Horse Kohl ×5
Mastery: Structural Support
- M1
Skill Summary - 3 ×5
Transmuted Salt Agglomerate ×3
Oriron Cluster ×2 - M2
Skill Summary - 3 ×6
Oriron Block ×3
Cutting Fluid Solution ×5 - M3
Skill Summary - 3 ×10
D32 Steel ×4
Refined Solvent ×4
Module: Engineering Recorder (HES-X)
- Stage 1
Module Data Block ×2
Sugar Lump ×3
LMD ×40,000 - Stage 2
Module Data Block ×2
Data Supplement Stick ×20
Crystalline Circuit ×4
LMD ×50,000 - Stage 3
Module Data Block ×2
Data Supplement Instrument ×8
Grindstone Pentahydrate ×5
LMD ×60,000
How to get Cement
Recruitment & Headhunting
Art















