Deals AOE Arts damage

Operator Description

12F, Caster Operator of Rhodes Island, will provide tactical aid for the squad with Originium Arts.

Operator Quote

At least he can help out with something.

Obtain Approach

Operator can only be obtained through Recruitment (using Recruitment Permits).
Headhunting: No Recruitment: Yes
Release Date (CN) 4/30/2019
Release Date (Global) 1/16/2020
Recruitment Pool Date (CN) 4/30/2019
Recruitment Pool Date (Global) 1/16/2020


Potential Item

12F's Token A piece of chocolate wrapped in old packaging. The words 'Merry Christmas' are written on the back, barely legible.


50% Physical Dodge
Talents from Module Upgrades


Arts Resist
Redeploy Time
DP Cost
Attack Interval

RIIC Base Skills

Room Type:
Reception Room
When this Operator is assigned to the Reception Room, Clue search speed increases by 20%
Training Record Lvl: 30
Room Type:
When this Operator is assigned to the Workshop to process Chips, the production rate of byproduct increases by 70%

Botzu's Quick Evaluation

+ Trait: Attacks splash to nearby enemies
+ Talent: 50% physical Dodge
+ A very cheap to develop and deploy AoE Caster (AoE Casters are a relatively expensive to deploy Archetype)
- Much weaker than his easy-to-get 3 Star counterpart Lava

Operator Overview

“12F? That was the day I came to this world. You could say it's my birthday.”

Considering the horrors he’s witnessed and the battles he’s fought, 12F was a seasoned soldier long before he became a Rhodes Island Operator. He quietly lends his expertise to the squads he participates in, both on an advisory level and as a 2 AoE Caster. (Note, however, that he does not have the “AoE” tag for Recruitment, for some reason. Don’t put “Starter” and “AoE” tags together and expect him to show up.)

As a 2★ Starter Operator, 12F has no Skills and cannot be promoted. He does gain a Talent upon reaching level 30, though: Dodge Rate Up, which grants an enormous amount of passive Physical Dodge. Combined with his surprisingly high HP (even without promotion, his HP is higher than some 3 Casters at max level), 12F can be unexpectedly survivable, especially if you stack additional sources of Physical Dodge on him from other Operators.

As an AoE Caster, 12F’s role is to do damage, usually to counter huge waves of weak enemies, and despite his purely defensive Talent and lack of promotion, his DPS is often sufficient to get the job done in the early game. As a 2 unit, he also benefits from low DP cost (high DP cost is a drawback for most AoE Casters) and cheap upgrade costs, causing some Doctors to choose him over his higher-rarity, higher-DPS counterpart Lava. It’s a personal decision whether to raise 12F or Lava (or both), but 12F can certainly pull his weight when you’ve got a mass of Originium Slugs that need slaying.

Newbie Tier List Explanation

Extremely cheap and gets the job done. Also dodge memes!

Total Cost

Operator Profile

Artist Hǎimāo Luò Hé Wù
CV Takuya Satou
CV (CN) 黑石稔
CV (KR) 金英善
Gender Male
Place of Birth Unknown
Birthday Mar. 3
Race Savra
Height 181cm
Combat Experience
5 years
Infection Status Non-infected as confirmed by medical report.
Physical Strength Normal
Mobility Excellent
Physiological Endurance Normal
Tactical Planning Normal
Combat Skill Normal
Originium Adaptability Standard


12F was the alias commonly used by this Operator in his mercenary work. By his own account, he vacillated between different factions and was involved in several famous battles over the past few years.
The few verifiable documents we have confirmed that 12F was indeed present for these conflicts, either as a regular mercenary or security for a local facility.
He joined Rhodes Island with Owl, having been admitted for his unique combat experience as well as his experience in general. Now a standard Arts Operator assigned to normal duty.

Clinical Analysis

Increase Trust to 25.
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 12F showed no symptoms of Oripathy.

[Blood Originium-Crystal Density] 0.09u/L
Operator 12F rarely comes into contact with Originium.

Archive File 1

Increase Trust to 50.
Originium Power Assessment:
Despite his extensive combat experience, 12F's Originium power was not decisive in any of his battles, as his own accounts confirm. But his grasp of Originium power is slightly better than your typical caster, and maybe factor into his continued survival.

Archive File 2

Increase Trust to 100.
12F appears very stern and abrasive, but feedback from most Operators who have worked with this inconspicuous caster has been positive. The comments include 'Didn't hold up the squad,' 'helped smooth over internal conflicts,' 'provided timely assistance,' 'made unexpectedly good suggestions.'

Archive File 3

Increase Trust to 150.
12F gets along with many Operators. In contrast, his closest friend, Operator Owl, has few other friends at Rhodes Island. 12F often makes concerted efforts to speak to Owl at places she frequents. Because the medical department is too busy to keep up on Owl's state of mind, F12 has been providing regular reports.

Archive File 4

Increase Trust to 200.
12F has described many of his battles in detail, but reports that he's forgotten what his home and family looked like. '12F' was the designation he was given for his first mission. That was when he met Owl, who was on the opposing side. He was gravely wounded but lived long enough to become a prisoner of war.

Voice Lines

Appointed as Assistant Forgive me, Doctor... There are limits to what I can do, including in conversation... but I'm honored to be your assistant. I look forward to helping you with your work.
Talk 1 Doctor, time heals all wounds. Please have more confidence in yourself. Your Operators have chosen to follow you because we believe that you will bring positive change.
Talk 2 Many Infected have relocated to Rhodes Island... not because they have any particular goals to achieve, but simply because they want a place to call home. The world outside no longer accepts them, after all...
Talk 3 Owl may not seem very friendly, but she's got a good heart. Please excuse her and pay her no mind.
Talk after Trust Increase 1 12F? That was the day I 'came to' this world. You could consider it my birthday.
Talk after Trust Increase 2 I might not be able to spend my entire life serving one person... but at least I can start working on it now.
Talk after Trust Increase 3 She has finally found you, Doctor. What a perilous journey it's been. You're very important to her, as well as to everyone else.
Idle I'll be by your side watching over you, Doctor, even in your sleep. So rest easy, you have nothing to fear.
Onboard You have my thanks for allowing me to join you. From now on, I will do my best to serve you, Doctor, with my alchemical skills. I have never had a name... but if you must call me something, you can refer to me as 12F.
Watching Battle Record I see, I understand now. Thank you for your guidance.
Added to Squad I may not possess outstanding skills, but I will do my best.
Appointed as Squad Leader Will it be alright for me to be the leader? Anyway, thank you for your trust, Doctor.
Depart Relax, Doctor. We will complete this operation in no time.
Begin Operation Everyone, get ready for battle.
Selecting Operator 1 Your orders?
Selecting Operator 2 Ready for action.
Deployment 1 Got it.
Deployment 2 Copy.
In Battle 1 Please show me the path.
In Battle 2 Burn to ashes.
In Battle 3 Clear away all obstacles.
In Battle 4 Watch out, Owl!
4-star Result I'm used to failure... but a victory after countless defeats is always the most precious one. Don't you agree, Doctor?
3-star Result This victory is all yours, Doctor. And I am honored to be a pawn in your game of chess.
Sub 3-star Result That was a hard-won victory, but we did it. Are you all right, Owl?
Operation Failure Failure is only normal. Don't be discouraged. I've been in many wars, and my experience tells me that your victory will come soon.
Assigned to Facility If you'd like, I can help. No trouble.
Tap Aah! Be careful.
Trust Tap I am so thankful for all that you have done for me. I feel ashamed I have so little with which to repay your kindness. Forgive me, Doctor.
Title Arknights.
Greeting Good morning to you, Doctor.

Operator Records

Record: Certain Choices
Unlock: Level 30, Trust Required: 50
Story Text

Paradox Stages

Stage Name: mem_12fce_1
Unlock: Level 30
12F is an experienced, foundational Caster Operator. While ensuring survival, he can use Originium Arts to damage enemy units in an area of effect.
Under favorable terrain and with compatible operators, 12F gives his all to his own advantage, creating opportunities for his teammates.
Sudden bursts of firepower tend to affect Caster Operators' performances, but 12F has his answers to those, and those little knacks are the secret to his continued survival.