Eunhwa: Tactical Upgrade

A Fire, Burst stage 2 Sniper Attacker Nikke.
Her range of use is narrow, and she is low priority as a substitute for top-tier Burst 2 units.
She is used in limited cases where conditions fit, such as Fire Raids or DEF-ignoring squads.

AS Formation2, while she is alive, maintains Increased Critical Rate for the same squad, Increased Charge Damage for all allies, and Increased ATK for herself. While LT Formation is active, all allies also gain increased Projectile Explosion Damage and increased DEF-ignoring damage.

Camouflage is applied when she uses Burst and on Full Charge during Full Burst Time, and is removed when she takes a direct hit. Only while Camouflaged do her basic attacks turn into DEF-ignoring damage.

Explosive RoundB fires one short charged shot that deals wide DEF-ignoring damage and applies a damage-taken increase (10 seconds) to the target hit. Burst Cooldown is 20 seconds.

She can be run in auto battle.
Take control of Eunhwa only when manual is needed, and release a charged shot right after Full Burst starts to apply the damage-taken debuff early.
Auto is fine for the rest.

In the same lineup as Emma and Vesti, it is easier to fill Formation and buff conditions together. It is not a fixed three-unit lineup.

In sniper play, reload and ammo count strongly affect Charge and reload timing. If ammo runs short, use an ammo refill Harmony Cube. If you have a higher-level cube, look at level before order.

Set Elemental Advantage damage and ATK as the baseline. Charge Damage and Crit Rate help both her Explosive RoundB and normal shots.

AS Formation2 carries most of her squad buffs, so raise S2 first. Her Burst holds both the Explosive RoundB damage and the damage-taken increase. Also cover S1 for the DEF-ignoring normal attacks tied to Camouflage.

She shows up in Fire Raids, campaign, and Absolute lineups. Her range of use is narrow compared to top-tier Burst 2 units. In Arena, explosion range and keeping Camouflage up largely decide the outcome.

She keeps granting allies Crit Rate and Increased Charge Damage.
Her Burst deals area DEF-ignoring damage and applies a damage-taken increase.
When Emma's LT matches, the squad's Projectile Explosion Damage and DEF-ignoring damage increases broaden too.

Camouflage breaks when she takes a direct hit.
Using her Burst Skill too early overlaps with the main DPS's Burst order and wastes the damage-taken debuff.
As a DPS-type Burst 2 she costs a lot to build, and if top meta alternatives exist, her priority drops.