
Supporter
Mayer
★★★★★
Rhine Lab
Introduction
Mayer is a 5-star character in Arknights. Mayer's class is Supporter. Faction: Rhine Lab.
On the combined Arknights tier list Mayer is B tier, 175th of the 410 characters ranked, from where 3 community tier lists put Mayer.
What Mayer does
Summons up to five Robotters, and any enemy they block loses 25 ASPD. Her second skill blows up every deployed Robotter for 600% of her ATK as Arts damage with a 2-second Stun, then gets them back. Her first gives Robotters, and allies next to them, 35% dodge.
Profile
Mayer is a female Anaty. Her birthday is November 20, and she stands 159cm tall. Mayer is voiced by Kousou Mao in Chinese, Anjali Kunapaneni in English, Chiwa Saito in Japanese, and Jung Hye-won in Korean. 幻象黑兔 drew her.
Stories
9Basic Info
[Code Name] Mayer
[Gender] Female
[Combat Experience] None
[Place of Birth] Columbia
[Date of Birth] November 20
[Race] Anaty
[Height] 159cm
[Infection Status]
Medical tests have confirmed that no infection is present.
Physical Exam
[Physical Strength] Normal
[Mobility] Standard
[Physical Resilience] Standard
[Tactical Acumen] Excellent
[Combat Skill] Standard
[Originium Arts Assimilation] Normal
Profile
Mayer was born in Columbia and is a member of Rhine Lab. She is the inventor of the 'Meeboo' wire control system. She is outstandingly capable and runs her own workshop called 'Lutra.' She is currently working with Rhodes Island to provide assistance with construction, planning, and development.
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 non-infected.
[Cell-Originium Assimilation] 0%
Operator shows no signs of infection at this time.
[Blood Originium-Crystal Density] 0.12u/L
Operator has been in long-term contact with Originium and frequently works to process it. However, due to strict adherence to safety protocols, Operator has not yet displayed any signs of Oripathy.
Archive File 1
Mayer frequently encountered Silence at Rhine headquarters since she was responsible for preparing, installing, and commissioning experimental devices for her. This was up until Silence abruptly disappeared which in turn caused this project to be terminated. Mayer often feels a sense of regret when reminded of this instance but had she known the true goal of the project, she would have pulled the plug herself.
Archive File 2
Mayer possesses just the right mixture of a scientist's meticulous thinking and an engineer's hands-on mentality. If there's any downside to this, it's that she never has enough time. If you don't believe it, take a look in her personal dictionary. The word 'idle' is missing.
Archive File 3
Mayer's head contains a multitude of, shall we say, volatile ideas, which makes it no surprise when she creates something eccentric. Out of her countless inventions, her prized and most cherished 'masterpiece' is 'Meeboo.' Mayer diligently creates nameplates for each individual 'Meeboo' and carefully cleans up its wreckage after it's served its purpose. It is clear that she pours her heart and soul into the maintenance and operation of each Meeboo, despite their mechanical origins.
Archive File 4
Since Meeboos take up so much space, Mayer's workshop is extremely cramped, causing her to devise ways to expand it. Despite having a room twice as large as anyone else's, she has managed to run out of space after increasing Meeboo production. Mayer has begged the Doctor to increase her room's size. That request was denied by the logistics department out of fairness towards others. Despite this ban on room expansion, the Doctor nonetheless granted her extra space in the hangar to allow her to continue the production of her Meeboos.
Promotion Record
So far, a total of 80 Meeboos have been constructed by Mayer. 20 of them are serving in Mayer's squad, while the others have been disassembled for various reasons. All available components have been installed on these models in service and are uniquely named by Mayer on their respective nameplates. Of the 20 Meeboos in service, there remains a single one with an unknown serial number that Mayer uses both as a mobile workbench and an experimental prototype. Despite its advanced functions, it is unarmed and useless for combat.
Stats
- HP439th of 4551,068
- ATK369th of 455443
- DEF323rd of 455130
- RES25th of 45220
- Block1
- DP cost47th of 44611
- 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: 480ATK: 199DEF: 56RES: 15Block: 1DP: 9Redeploy: 70Interval: 1.6
- Elite 0 Lv. 50HP: 649ATK: 285DEF: 80RES: 15Block: 1DP: 9Redeploy: 70Interval: 1.6
- Elite 1 Lv. 70HP: 843ATK: 380DEF: 107RES: 20Block: 1DP: 11Redeploy: 70Interval: 1.6
- Elite 2 Lv. 80HP: 1068ATK: 443DEF: 130RES: 20Block: 1DP: 11Redeploy: 70Interval: 1.6
Base values before trust, potentials and modules. Full trust adds HP +200, ATK +35.
Trait
- Deals Arts damage Can use Summons in battles
Skills
2
Bionic Device
Passive · Unlocks at Elite 0LevelAll Robotters gain 35% Physical and Arts Dodge Allies on Robotters' four adjacent tiles also gain the same buff

Detonate and Recycle
Manual trigger · Auto recovery · Unlocks at Elite 1LevelDetonates all Robotters immediately, dealing 600% of Mayer's ATK as Arts damage to nearby enemies and Stunning all hits targets for 2 second(s) The exploded Robotters will be recycled
- SP cost
- 30
- Initial SP
- 0
Talents
1Robotter
- Elite 0
- Can summon 3 Robotters; Enemies have -10 ASPD when blocked by Robotters
- Elite 1
- Can summon 4 Robotters; Enemies have -25 ASPD when blocked by Robotters
- Elite 2
- Can summon 5 Robotters; Enemies have -25 ASPD when blocked by Robotters
Potentials
- Potential 2
- DP Cost -1
- Potential 3
- Redeployment Time -4 sec
- Potential 4
- RES +8
- Potential 5
- Redeployment Time -6 sec
- Potential 6
- DP Cost -1
Modules
1
'Meeboo' Control Terminal XP (SUM-X)
Unlocks at Elite 2 Lv. 50StageStatsTraitTalent- Stage 1Stats: HP +80, ATK +25Trait: The first summoned unit does not consume deployment slots (The last summoned unit on the field does not return a deployment slot when retreated or defeated)
- Stage 2Stats: HP +100, ATK +35Trait: The first summoned unit does not consume deployment slots (The last summoned unit on the field does not return a deployment slot when retreated or defeated)Talent: Can summon 5 Robotters; Enemies have -28 ASPD when blocked by Robotters
- Stage 3Stats: HP +120, ATK +40Trait: The first summoned unit does not consume deployment slots (The last summoned unit on the field does not return a deployment slot when retreated or defeated)Talent: Can summon 5 Robotters; Enemies have -30 ASPD when blocked by Robotters
To unlock
- Complete 5 operations and summon Mayer's summoned units at least 5 times in each operation (Mayer cannot be a Support Unit)
- Clear Main Theme 2-9 with a 3-star rating using a squad of at most 3 units (including Support Units); a non-Support Mayer must be deployed during the operation and only Sniper operators are allowed for the remaining units
Module record
Multithreading enhancements, Completed
Meeboos maintenance, Completed
Detonate and Recycle circuitry, Completed
System upgrade, Completed
Undisclosed plan, In early development stages
......
Closure's AI buggies are so amazing.
I want them! I really want them! And I want all my Meeboos be like that!!!
A whole squadron of Meeboos that does what I want by themselves. Heh... hahah.
......
Closure did say that she doesn't have all of the code and computational logic figured out, and that she still has to rely on Rhodes Island's core for part of its upkeep.
It wouldn't feel right to reuse technology that I don't understand, so I will just make my own.
Meeboos' service efficiency has improved quite a bit lately, and their Detonate and Recycle rate has been stable. I'd say the research on it has come pretty far.
Next up, Research on Meeboos' automation logic...
The learning device's been installed on Meeboos No. *unknown number* for a while now, and it's made some progress.
That is, if opening the door for guests counts as progress, haha...
Given what a complex environment the battlefield is, I'm afraid sending it there will affect its operations.
But if I don't take it there, it won't collect any data either...
......
I ended up bringing it with me. I've backed up all the data and logged down all the hardware specifications.
If... Just if... If it ends up getting wrecked and written off, I'll have to come up with some kind of way to squeeze some compensation and a few days off out of the Doctor.
Then I'll have to spend half a year again to build a new one...
Please, let there be some kind of breakthrough! Just a little will do!!
This isn't for the old guys at Engineering or myself.
It's for your own good, Meeboos!
If there comes a day you reach the AIs' level, what should I say to you?
Oh, whatever. We've been friends for so long, I guess both of us know deep in our hearts what we want to say to each other.
Right, Meeboos?, Excerpts from 'Meeboos Maintenance Diary' by Mayer Stony, Lutra Workshop Member of Rhine Lab Engineering Department
Base skills
2
Meeboo: Processing
Workshop · Elite 0When this Operator is assigned to the Workshop to process any material, the production rate of byproduct increases by 65%

Meeboo: Manufacturing
Factory · Elite 2When this Operator is assigned to a Factory, productivity +30%
Outfits
3
Elite 1
Default Outfit
Art by 幻象黑兔

Elite 2
Default Outfit
Art by 幻象黑兔

Visionblazer in the Courtyard
Dreambind Castle
Art by 幻象黑兔
Store
Voice lines
38Show all 38 lines
- Appointed as Assistant
- Structural design, industrial R&D, scientific research. You name it, and I can do it, Doctor.
- Talk 1
- The Engineering Department never approve my proposals. Do they have any bias toward me? What should I do... Oh! Actually, Doctor, would you please submit this suggestion on improvement for me? It's a deal then!
- Talk 2
- There are many workshops like mine in Rhine Lab, but what takes others six weeks to finish, I can have it done in one. I'm not boasting!
- Talk 3
- DO NOT interrupt me when I'm doing my research, or I'll have my Meeboos bite you! And I will bite you too!
- Talk after Promotion 1
- At night I'm always full of inspiration... and the… urgency to sleep! No, I can't bear it... Where's the pillow... I need to rest...
- Talk after Promotion 2
- Hm? Why are these cuties called Meeboos? That's because they go 'meeee-boooo' when they boot up. So I named them after that. Fitting, don't you think? Just listen and you'll get it. You press this switch to... NONONONO, That's the self-destruct button! Ahhhhhh run!
- Talk after Trust Increase 1
- That girl who just passed by... that was Silence, right? If only back then... Oh, sorry, the non-disclosure agreement is still in effect. I should keep my mouth shut.
- Talk after Trust Increase 2
- I feel kinda empty when I've got nothing to do... I guess that's just how engineers are. I bet even you have to idle your time away on occasion, Doctor. Huh? You don't?
- Talk after Trust Increase 3
- Doctor, may I request... No! Not 10 square meters! I asked for too much last time, so this time... all I need is 3! W-Wait! Don't leave yet! 1 square meter, just 1 more for my research will do! Please, Doctor, I'm begging you...
- Idle
- Geez... where's the coffeemaker... Oh, there it is... You want some too, Doctor?
- Onboard
- Lutra Workshop of Rhine Lab, at your service. Yup, I run the workshop on my own. No assistance needed. Amazing, right?
- Watching Battle Record
- This structure... Interesting. I'll look into it.
- Promotion 1
- This raise came just in time! I can afford to upgrade my equipment now.
- Promotion 2
- I promised that you'd not be disappointed. Now look what I have! Surely kept my end of the bargain, didn't I?
- Added to Squad
- Time to go, Meeboos!
- Appointed as Squad Leader
- Commanding both Operators and my Meeboos at the same time is a bit much even for me...
- Depart
- Hopefully we can get some useful experiment data!
- Begin Operation
- Come on, Meeboo, show them what Rhine Lab's technology can do!
- Selecting Operator 1
- Whoa!
- Selecting Operator 2
- Careful! Be gentle with it!
- Deployment 1
- Handle with care!
- Deployment 2
- Precision equipment isn't cheap!
- In Battle 1
- Get 'em, Meeboo #3!
- In Battle 2
- Bite 'em, Meeboo!
- In Battle 3
- If anything breaks, just make another one!
- In Battle 4
- My Meeboos are more than just machines!
- 4-star Result
- Come on, Meeboo! Show everyone your victory dance!
- 3-star Result
- Nice! We practically rolled over them!
- Sub 3-star Result
- The device is slightly damaged. I'll fix it in no time.
- Operation Failure
- Oh no! My Meeboo...! I'll need to make more...
- Assigned to Facility
- Now I want a new workshop!
- Tap
- Whuah?! Hey, I'm working here!
- Trust Tap
- Doctor, let me touch your head! Inspiration can strike, you know!
- Title
- Arknights.
- New Year's blessing
- Happy New Year, Doctor! I love New Year's, there's always so much to eat when you go out, even if you miss the canteen's dinner time! I wish every day could be like that... Ouch! Alright, fine Meeboo, I'll eat on time, you're hurting me!
- Greeting
- Heya, Doctor!
- Birthday
- Your birthday present? A literal piece of cake! Here's a cake sample, complete with blueprint, recipe, and a mass-production line ready for full rollout! How's that?
- Anniversary Celebration
- What is research for, Doctor? My former coworkers say I can be surprisingly shallow, but if I were only in it for the money or fame, there are better ways. I just want to help advance technology, even by a little bit. And here, I can do that.
Upgrade costs
Open in the plannerPromotion
- Elite 1
Supporter Chip ×4
Polyester ×5
Device ×2
LMD ×20,000 - Elite 2
Supporter Dualchip ×3
Oriron Block ×6
RMA70-12 ×11
LMD ×120,000
Skill levels
- Lv. 2
Skill Summary - 1 ×4 - Lv. 3
Skill Summary - 1 ×4
Ester ×7 - Lv. 4
Skill Summary - 2 ×6
Oriron ×3 - Lv. 5
Skill Summary - 2 ×6
Polyketon ×4 - Lv. 6
Skill Summary - 2 ×6
Manganese Ore ×4 - Lv. 7
Skill Summary - 3 ×6
Grindstone ×2
Orirock Cluster ×4
Mastery: Bionic Device
- M1
Skill Summary - 3 ×5
RMA70-24 ×3
Manganese Ore ×2 - M2
Skill Summary - 3 ×6
Sugar Lump ×3
RMA70-24 ×5 - M3
Skill Summary - 3 ×10
D32 Steel ×4
Oriron Block ×3
Mastery: Detonate and Recycle
- M1
Skill Summary - 3 ×5
Orirock Concentration ×3
Grindstone ×4 - M2
Skill Summary - 3 ×6
Polyester Lump ×3
Orirock Concentration ×6 - M3
Skill Summary - 3 ×10
Polymerization Preparation ×4
Manganese Trihydrate ×4
Module: 'Meeboo' Control Terminal XP (SUM-X)
- Stage 1
Module Data Block ×2
Sugar Lump ×3
LMD ×40,000 - Stage 2
Module Data Block ×2
Data Supplement Stick ×20
Manganese Trihydrate ×4
LMD ×50,000 - Stage 3
Module Data Block ×2
Data Supplement Instrument ×8
Orirock Concentration ×5
LMD ×60,000
How to get Mayer
Recruitment & Headhunting
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