Campaign Chain CDR Team: Liter · Helm: Aquamarine · Quency · Guillotine · 1 flex Attacker. Admire Accompaniment reduces the Burst Skill cooldown every time she enters Full Burst (up to -2.6 sec), letting the whole team chain bursts faster over the fight; Aegis Cannon Overload deals bonus damage if enemies are Electric. Arena/PvP Electric Counter Team: Helm: Aquamarine · Quency · 1 flex Defender · Noir · Power. Aegis Cannon Suppression Fire stacks Damage Taken on Electric-element targets, letting Noir and Power finish off the opponent's Electric Nikkes fast in PvP. Raid & Interception Fast Burst-Cycle Team: Rei · Helm: Aquamarine · Biscuit · Guillotine · 1 flex Attacker. Burst Skill cooldown keeps shrinking with each Full Burst entry, letting the whole team chain bursts tighter through a long Raid/Interception fight — even stronger if the boss is Electric-element.

Helm: Aquamarine — Stats, Skills, Best Teams

Q: Should you pull?

Should you pull?CONSIDER IT — only worth pulling if you specifically need an Electric-shred Attacker, since her Burst is rated by the KR community as one of the weakest Bursts in the game. General players should prioritize other Attackers first.

30-second summary of Helm: Aquamarine

Helm: Aquamarine is a Iron Nikke in the Attacker class, manufactured by Elysion. Stats and skill text below come straight from the game's data.

“Feeling the summer weather and seeing the ocean has Helm feeling more chipper, as she envisions steering The Admire on the aquamarine waters.”

Updated: 2026-08-02

Should you pull?

CONSIDER IT — only worth pulling if you specifically need an Electric-shred Attacker, since her Burst is rated by the KR community as one of the weakest Bursts in the game. General players should prioritize other Attackers first.

Review & Analysis

Helm: Aquamarine is an Iron Attacker sitting at tier S, dealing much higher damage against Electric Code enemies. Her Burst, Aegis Cannon Overload, hits all enemies for 105.58% of final ATK, adding a massive extra 164.83% against Electric Code targets. Aegis Cannon Suppression Fire hits 1 random enemy for 105.58% of final ATK, stacking a Damage Taken debuff (+5.64%, up to 5 stacks) for 5 seconds if that target is Electric Code. Admire Accompaniment adds 131.34% of final ATK as bonus damage every 30 normal attacks landed, and on Full Burst grants all allies repeating cooldown reduction by activation count (1.82s, 2.2s, 2.6s). Currently tier S.

Base Stats

HP583,734

ATK25,554

DEF4,164

Max Ammo60

Reload Time1s

Skills

Normal Attack

■ Affects target enemy.
Deals 13.65% of ATK as damage.

Admire AccompanimentSkill 1

■ Activates after landing 30 normal attack(s). Affects the target(s).
Deals 131.34% of final ATK as additional damage.
■ Activates when entering Full Burst. Affects all allies.
Effect changes according to the activation time(s)
Previous effects trigger repeatedly:
Once: Cooldown of Burst Skill ▼ 1.82 sec.
Twice: Cooldown of Burst Skill ▼ 2.2 sec.
Three times: Cooldown of Burst Skill ▼ 2.6 sec.

Aegis Cannon Suppression FireSkill 2

■ Affects 1 enemy unit(s) randomly.
Deals 105.58 of final ATK as damage.
■ Affects the same target(s) when they belong to Electric Code.
Damage Taken ▲ 5.64% stacks up to 5 time(s) and lasts for 5 sec.

Aegis Cannon OverloadBurst Skill

■ Affects all enemies.
Deals 105.58% of final ATK as damage.
■ Affects the same target(s) when they belong to Electric Code.
Deals 164.83% of final ATK as additional damage.

Skill Investment Priority

Burst first — main AoE hit with a massive bonus against Electric Code enemies. Skill 2 next, its Damage Taken stack on Electric Code targets amplifies that bonus. Skill 1 last, tied to a 30-hit condition.

Skill investment roadmap (Skill 1/Skill 2/Burst — per KR community): 1/1/1 → 1/4/1 → 4/7/4 (graduate here) → 7/10/4. Why: Skill 2 is by far the priority, then Skill 1, Burst lowest — per multiple independent community sources.

Strengths & Weaknesses

Strengths

Both Skill 2 and Burst deal bonus damage specifically against Electric-element targets, giving a clear armor-piercing edge in Electric-heavy content.
Skill 2 stacks Damage Taken on its target up to 5 times, so the longer the fight goes, the more damage the enemy takes.

Weaknesses

Her AR normal-attack multiplier is only 13.65% ATK, below the general average, so she relies heavily on skills for damage.
Skill 1 needs 30 normal attacks to trigger, slow to come online in short fights.
Per KR community consensus, Helm: Aquamarine's Burst is rated among the weakest Bursts in the game due to its low damage and lack of meaningful secondary effects outside the Electric-type bonus.

Overload Priority

Overload priority by weapon type — applies to every Nikke using this weapon.

Sub-stat	Priority	Rolls
ATK		4x
Hit Rate		2-4x
Elemental DMG		2x
Max Ammo		1-2x

Gear →

General Info

Meta Tier

C

Class

Attacker

Element

Iron

Weapon Type

AR

Manufacturer

Elysion

Squad

Aegis

Voice Actors

Sa Moonyoung · Kaitlyn Robrock · Marina Inoue

Release date

10 august 2023

Recommended Build

Cubes

Bastion Cube / Resilience Cube

Overload (OL) Priority

Increase ATK › Increase Hit Rate › Increase Max Ammunition Capacity

Suggested by role & weapon. See: Gear · Cubes

Recommended Teams

Campaign

Chain CDR Team: Liter · Helm: Aquamarine · Quency · Guillotine · 1 flex Attacker. Admire Accompaniment reduces the Burst Skill cooldown every time she enters Full Burst (up to -2.6 sec), letting the whole team chain bursts faster over the fight; Aegis Cannon Overload deals bonus damage if enemies are Electric.

Arena/PvP

Electric Counter Team: Helm: Aquamarine · Quency · 1 flex Defender · Noir · Power. Aegis Cannon Suppression Fire stacks Damage Taken on Electric-element targets, letting Noir and Power finish off the opponent's Electric Nikkes fast in PvP.

Raid & Interception

Fast Burst-Cycle Team: Rei · Helm: Aquamarine · Biscuit · Guillotine · 1 flex Attacker. Burst Skill cooldown keeps shrinking with each Full Burst entry, letting the whole team chain bursts tighter through a long Raid/Interception fight — even stronger if the boss is Electric-element.