Rei
A third-year student from the M.M.R. Vocational School, who nevertheless has the appearance of a small child. Despite the fact she is childlike in both her demeanor and personal hobbies, she utterly despises being referred to as "kid" or "little girl". As a senior, she feels obligated to take care of her fellow students who are younger than her, and spares no effort in doing so.
- EN：Tatiana Barrie
- JP：Aimi Tanaka
- KR：Bang Yeon-ji
- Tetra
- Defender
- Submachine Gun
- SSR
Submachine Gun
Ammo：120
Reload：1.83 sec
Burst Gen：0.1 %
Affects target(s). Deals 9.15 % of ATK as damage. Deals 200 % damage when attacking core.
PassiveSenior Support
Activates after 60 normal attack(s). Affects all allies. Fills Burst Gauge by 2.47 % . Affects decoy when decoy exists. Recovers HP by 2.1 % of the caster's final Max HP.
PassiveSenior Spirit
Activates when entering battle. Affects self. Decoy : Creates an Avatar with 96 % of caster's final Max HP for 240 sec.
Active20 secModel Senior Student
Affects self. Attract: Taunt all enemies for 5 sec. Damage Taken ▼ 14.4 % for 10 sec. Affects decoy when decoy exists. Constantly recovers 2.27 % of caster's final Max HP every 1 sec for 10 sec.
School Circle
A group of students from the M.M.R. Vocational School, an educational institution established to improve a Nikke's performance. This squad comprises students who have excelled in their studies, and its members are placed in genuine combat situations outside of school hours.
| Image | Name | Role | Manufacturer | Element | Weapon | Burst LV | Burst CD |
|---|---|---|---|---|---|---|---|
 | Zwei | Supporter | Elysion | Electric | Shotgun | 2 | 20 |
 | Ein | Attacker | Missilis | Electric | Sniper Rifle | 3 | 40 |