
Guard
Matoimaru
★★★★
Higashi
Introduction
Matoimaru is a 4-star character in Arknights. Matoimaru's weapon type is Naginata and class is Guard. Faction: Higashi.
On the combined Arknights tier list Matoimaru is C tier, 321st of the 410 characters ranked, from where 3 community tier lists put Matoimaru.
What Matoimaru does
Trades DEF for health: her talent cuts 20% DEF and adds 23% Max HP. One skill heals her for half her Max HP, and the other drops her DEF to zero for 150% more ATK.
Profile
Matoimaru is a female Oni. Her birthday is Jan. 3, and she stands 172cm tall. Matoimaru is voiced by Ellen Wang in Chinese, Maddie Matsumoto in English, Airi Ohtsu in Japanese, and Chae Min-ji in Korean. 竜崎いち drew her.
Stories
8Basic Info
[Code Name] Matoimaru
[Gender] Female
[Combat Experience] 3 years
[Place of Birth] Higashi
[Date of Birth] Jan. 3
[Race] Oni
[Height] 172cm
[Infection Status]
Medical tests have confirmed that no infection is present.
Physical Exam
[Physical Strength] Excellent
[Mobility] Standard
[Physical Resilience] Excellent
[Tactical Acumen] Normal
[Combat Skill] Standard
[Originium Arts Assimilation] Excellent
Profile
This nomadic warrior from Higashi joined Rhodes Island by sheer chance.
What she lacks in strategic acumen, she makes up with a mean giant sickle swing.
Clinical Analysis
Imaging tests on this Operator show clear outlines of internal organs, with no abnormal dark spots or shadows. No unusual traces of Originium particles present in the circulatory system, no signs of infection, confirming this operator as uninfected.
[Cell-Originium Assimilation] 0%
Operator Matoimaru showed no symptoms of Oripathy.
[Blood Originium-Crystal Density] 0.12u/L
Operator Matoimaru rarely comes into contact with Originium.
Archive File 1
Matoimaru is a magnificent warrior from Higashi.
She is simpleminded and prone to deception. She does catch on, but a new trick will fool her again.
Her hobbies, at which she excels, are sparring, soccer, and floral arrangement. She has been known to organize events around these subjects, though her idea of organization is typically dragging people kicking and screaming into it.
Archive File 2
The Oni are still a mystery to most people. Aside from living in Higashi, there seems to be little in common among the race.
However, Matoimaru is yet even more different from other Oni: Her bloodlust makes her performance on the battlefield strikingly unique, though it seems she's not aware of this fact.
Archive File 3
Many Operators think Matoimaru is crude and unrefined, but they are mistaken.
They just need to check out her floral arrangements, on display every Saturday at 3pm.
The beauty she can create is positively astonishing.
Archive File 4
Matoimaru is obviously self-conscious about her flaws: She is not good at controlling her strength or at critical thinking.
She took up floral arrangement to refine herself and to show the others they don't need to fear her.
Despite this, she's remains quite gullible. At least she has learned to question the idea that she must be a great thinker in order to survive.
As far as she is concerned, her ideal companion would be someone who won't deceive or betray her, and will stay with her and guide her. How wonderful that would be...
Stats
- HP26th of 4553,640
- ATK43rd of 455916
- DEF285th of 455156
- RES0
- Block1
- DP cost178th of 44617
- Redeploy70s
- Attack interval212th of 4551.5s
At Elite 2, level 70, 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: 1514ATK: 396DEF: 70RES: 0Block: 1DP: 15Redeploy: 70Interval: 1.5
- Elite 0 Lv. 45HP: 2019ATK: 592DEF: 100RES: 0Block: 1DP: 15Redeploy: 70Interval: 1.5
- Elite 1 Lv. 60HP: 2693ATK: 760DEF: 131RES: 0Block: 1DP: 17Redeploy: 70Interval: 1.5
- Elite 2 Lv. 70HP: 3640ATK: 916DEF: 156RES: 0Block: 1DP: 17Redeploy: 70Interval: 1.5
Base values before trust, potentials and modules. Full trust adds HP +450.
Trait
- Blocks 1 enemy
Skills
2
Regeneration β
Manual trigger · Auto recovery · Unlocks at Elite 0LevelRestores HP by 50% of Max HP
- SP cost
- 20
- Initial SP
- 10

Demonic Power
Manual trigger · Auto recovery · Unlocks at Elite 1LevelDEF reduces to 0; ATK +150%
- SP cost
- 25
- Initial SP
- 10
- Duration
- 15s
Talents
1Demonic Physique
- Elite 2
- DEF -20%; Max HP +20%
- Elite 2 · Potential 5
- DEF -20%; Max HP +23% (+3%)
Potentials
- Potential 2
- DP Cost -1
- Potential 3
- Redeployment Time -4 sec
- Potential 4
- Max HP +180
- Potential 5
- Improves Talent
- Potential 6
- DP Cost -1
Modules
1
Bamboo Ikebana (DRE-Y)
Unlocks at Elite 2 Lv. 40StageStatsTraitTalent- Stage 1Stats: HP +270, ATK +35Trait: When defeated, does not retreat and recovers all HP instead. However, Max HP -60% and ASPD +30 (Can only activate once every deployment)
- Stage 2Stats: HP +340, ATK +45Trait: When defeated, does not retreat and recovers all HP instead. However, Max HP -60% and ASPD +30 (Can only activate once every deployment)Talent: DEF -20%; Max HP +30%
- Stage 3Stats: HP +390, ATK +55Trait: When defeated, does not retreat and recovers all HP instead. However, Max HP -60% and ASPD +30 (Can only activate once every deployment)Talent: DEF -20%; Max HP +35%
To unlock
- Complete a total of 5 battles; You must deploy your own Matoimaru, and have Matoimaru deal at least 15,000 damage
- Clear Main Theme S2-10 with a 3-star rating; You must deploy your own Matoimaru, and have Matoimaru defeat at least 2 Senior Casters
Module record
The young Oni warrior passes by this street every day, sticking to the glass of the florist's shop to see the new ikebana arrangement, before leaving satisfied. It is difficult to identify the age of an Oni, but she carries a bamboo naginata on her back, indicating that she is still a musha in training. Our florist has a secret rule: Oni are not allowed inside because their actions are uncouth, and if they are not careful, they will destroy months of the flower arrangers' efforts in the blink of an eye. We are justifiably cautious, as we never know if they might have the support of their kin from the underworld behind them.
There is an alley on the other side of the florist, and misbehaving students use it as a hideout. They demand money from their frail and weak classmates, throwing them to the ground or stomping on them. This Wednesday evening, I saw a little boy with a backpack run by the window with a sullen, tear-stained face and a bruised nose. On Thursday, he passed by this place with the Oni, but soon turned back alone and squirmed back into the alley.
On Friday afternoon, I was helping the master arrange flowers when I saw people squatting along the side of the street with water pipes, wine bottles, crowbars, and the like. Before we could call the police, the person they were waiting for arrived. The Oni musha accompanied the little boy from school just like yesterday. When they got to our window, the little boy suddenly began to pick up his pace, and the teens who were bullying him quickly surrounded him.
They were almost ready to kill the Oni. The Oni's bamboo naginata managed to block a few blows, but was broken into several pieces by their sheer brute force.
Then, that was the first time I saw an ‘Oni.’
The Oni musha who had lost her weapon raised her fists, tearing through metal with her bare knuckles, smearing her own blood in the eyes of her opponents, lashing out with her knees and feet when her fists were blocked, striking out with her horns when her legs were restrained, biting with her teeth when her horns were blocked. When the whistle signaling the police's arrival came at last, only one was still standing, the Oni.
She wiped the corners of her bleeding lips emotionlessly, like the legendary man-eating fiends of lore. The people were intimidated by her silence and kept their distance to avoid her, pointing at her from behind windows and doors.
Then, my master opened the door of the flower shop and walked out, sliding a bamboo leaf freshly-folded into an appropriate shape into the palm of her hand.
The young Oni warrior blinked, as if she had woken up from a nightmare, carefully closed her fist, and smiled at my master.
Base skills
2
Tech Theory
Workshop · Elite 0When this Operator is assigned to the Workshop to process Skill Summaries, the production rate of byproduct increases by 70%

Order Distribution β
Trading Post · Elite 1When this Operator is assigned to a Trading Post, order acquisition efficiency +30%
Outfits
3
Elite 1
Default Outfit
Art by 竜崎いち

Elite 2
Default Outfit
Art by 竜崎いち

Frosted Steps
EPOQUE/XXXIX
Art by 竜崎いち
Store
Voice lines
38Show all 38 lines
- Appointed as Assistant
- Doctor, you gotta be hungry! Try some of my onigiri. They're great!
- Talk 1
- I've got a lotta hobbies: martial art sparring, soccer… Oh! And Ikebana! Some took me as a warrior with more brawn than brains, and I'd say they're the ones who's got a fat head!
- Talk 2
- My race eats other races? That's some old crap! Who told you that? Tch, those cowards, cooking up this nonsense behind my back. When I find'em, I'll give'em a lesson they'll never forget!
- Talk 3
- I'm born with this self-healing body. Even if I take a few cuts in the fight, the wounds will close back up in no time.
- Talk after Promotion 1
- Hey, Doctor, Rhodes Island's got a soccer tournament! C'mon, let's sign up together! No need to think twice! Just put me in your team, and it's in the bag. You'd better work your brain elsewhere, like a cool victory pose!
- Talk after Promotion 2
- You don't even recognize me on the battlefield? I just start cutting through enemies with a face as cold as my blade? Wow! Sounds hella badass! Wish I could watch myself out there.
- Talk after Trust Increase 1
- I got this problem where I kinda end up breaking stuff, so I'm working with my Ikebana teacher to control my strength. Besides, getting surrounded by all those pretty flowers makes me real happy!
- Talk after Trust Increase 2
- Strategy? Ehh, not really my forte. That's why I keep hopping right into the enemy's plans. But you, Doctor, you always stop me right before I lose my mind. Real nice to have you by my side.
- Talk after Trust Increase 3
- Actually, I've always been a gullible dummy. Got duped so bad in the past that I almost got myself killed a few times. But now I, Matoimaru, swear loyalty to you, Doctor! Because I know you'll never betray me.
- Idle
- Grr... Hey, no falling asleep, Doctor! I need a listener or I'm gonna die of boredom!
- Onboard
- Matoimaru, here to join Rhodes Island! My blade is at your command, Doctor!
- Watching Battle Record
- More fancy skills to beat those bad guys with!
- Promotion 1
- Doctor, put my strength to good work. That'll be the respect I deserve.
- Promotion 2
- Doctor, please stand back a bit. I don't want to hurt you when swinging my naginata. But I, Matoimaru, will bring us every victory in your name.
- Added to Squad
- Hah hah! You all look pretty tough. How about a warm-up with me?
- Appointed as Squad Leader
- Ugh, you want me to play captain? Then how am I suppose to throw myself into the battle!?
- Depart
- You guys ready to rumble? Then what are we waiting for!?
- Begin Operation
- Sorry to keep you waiting, bad guys!
- Selecting Operator 1
- I'm over here.
- Selecting Operator 2
- Just how long until it's my turn?
- Deployment 1
- Love that battlefield smell.
- Deployment 2
- Make 'em shake in their boots!
- In Battle 1
- Standing up to me? Haha, Ballsy!
- In Battle 2
- Ready to meet your demise?
- In Battle 3
- My blade shall rip you and your toy to ribbons!
- In Battle 4
- You end here!
- 4-star Result
- A sea of fire and a mountain of blades... Now that's what I call a fight. This is the battlefield I've always dreamed of.
- 3-star Result
- Doctor, I got 'em all! Huh? What happened here? Everything's busted… Um, wait a second, did I do it...?
- Sub 3-star Result
- I'll get 'em before they escape! Can't call the battle over unless we got every last of 'em!
- Operation Failure
- Retreat! I'll cover your escape. Make sure you don't get hit!
- Assigned to Facility
- Agh! Ow! My horn...!
- Tap
- Huh?
- Trust Tap
- What's with that smile on your face? Anything to share with me?
- Title
- Arknights.
- New Year's blessing
- Hey, Doctor, how does Rhodes Island celebrate the New Year? Oh, anything is welcome? Haha, alright then, I'll put together a soccer match with Matterhorn and the others! Make sure you come to watch!
- Greeting
- Uh huh, I'm listening.
- Birthday
- Happy birthday, Doctor! I wanted to fill your office with flowers, but my teacher said restraint is the first rule of Ikebana. So I made you this! And it should fit just fine on your desk!
- Anniversary Celebration
- This blade brings nothing but trouble when I'm holding it. Good thing I can trust you to tell me where to swing it. That way, nothing can go wrong!
Upgrade costs
Open in the plannerPromotion
- Elite 1
Guard Chip ×3
Orirock Cube ×1
Device ×1
LMD ×15,000 - Elite 2
Guard Chip Pack ×5
Aketon ×16
Sugar Pack ×10
LMD ×60,000
Skill levels
- Lv. 2
Skill Summary - 1 ×2 - Lv. 3
Skill Summary - 1 ×2
Orirock ×5 - Lv. 4
Skill Summary - 2 ×3
Sugar ×2 - Lv. 5
Skill Summary - 2 ×3
Polyester ×3 - Lv. 6
Skill Summary - 2 ×3
Manganese Ore ×2 - Lv. 7
Skill Summary - 3 ×4
Grindstone ×2
Mastery: Regeneration β
- M1
Skill Summary - 3 ×2
RMA70-24 ×1
Manganese Ore ×3 - M2
Skill Summary - 3 ×4
Sugar Lump ×2
RMA70-24 ×2 - M3
Skill Summary - 3 ×6
D32 Steel ×2
Polyester Lump ×2
Mastery: Demonic Power
- M1
Skill Summary - 3 ×2
Orirock Concentration ×1
Grindstone ×4 - M2
Skill Summary - 3 ×4
Polyester Lump ×2
Orirock Concentration ×3 - M3
Skill Summary - 3 ×6
Polymerization Preparation ×2
Optimized Device ×2
Module: Bamboo Ikebana (DRE-Y)
- Stage 1
Module Data Block ×1
Grindstone ×4
LMD ×20,000 - Stage 2
Module Data Block ×1
Data Supplement Stick ×15
Oriron Cluster ×5
LMD ×25,000 - Stage 3
Module Data Block ×1
Data Supplement Instrument ×5
Sugar Pack ×6
LMD ×30,000
How to get Matoimaru
Recruitment & Headhunting
Art
















