Arknights · operator

Underflow

Underflowアンダーフロー언더플로우

★★★★★Defender Sentry Protector Melee

Unchanged since July 16, 2026

Deployment

DP cost24

Block3

Redeploy (s)80

Stats Stats at any level →

HP3,253

ATK439

DEF696

RES0

Attack interval (s)1.2

Skills

Invasion ResponseS1 · Manual · Per second · SP 30 · Initial 15 · 30s · Lv.10

ATK+50%, DEF+50%

Drag to see per-level scaling

Pinning ManeuverS2 · Manual · Per second · SP 32 · Initial 25 · 15s · Lv.10

Attack Range increases, ATK +50%, ASPD +50. Attacks become toxic finspines that fire directly ahead, piercing through up to 4 enemies and inflicting Slow for 1 second

Drag to see per-level scaling

Talents · Signature passive abilities

Cell Activity Suppressant

Deals 90 (+10) Arts damage per second to targets on attacking, lasting 3 seconds (Damage is doubled against [Sea Monster] enemies)

Potentials · Potential-rank bonuses

Potential 2DP Cost -1Potential 3Redeployment Time -10 secPotential 4DP Cost -1Potential 5Improves TalentPotential 6DP Cost -1

Modules · Elite-2 equipment

A Neural Stimulant Based on 'Coffee'SPT-X

Recruitment tags

Senior OperatorMeleeDefenderDefenseDPSSlow

Profile

RaceÆgir

Place of birthÆgir

Date of birthAug 1

Height170cm

Combat experience8 years

Secunda, former Abyssal Hunter project researcher, now serving in Ægir's legions as a Praefecta of the Sea Patrol. After Ægir sent out their invitation for collaboration to their fellow nations, she has reached a cooperation agreement with Rhodes Island to act as Ægir's envoy to land. She is now registered as one of Rhodes Island's collaborating operators under the codename Underflow.