Emma: Tactical Upgrade
Fire 
Machine Gun 
Supporter 
Burst 1 
Elysion Tier 3 Environment Setup
■ Activates at the start of battle. Affects self.
Environment Setup
Function: Sprays a solution into the surroundings to create an advantageous battlefield.
Effect 1: Damage Taken ▲ 3.9% for 10 sec.
Effect 1 Target(s): All enemies (including those that appear during Environment Setup)
Effect 2: Environment Setup: Continuously recovers 2.32% of caster's final Max HP every 1 sec for 10 sec.
Effect 2 Target(s): All allies
Recurring interval: 30 sec
■ Activates when the enemy appears. Affects self.
Exposure (Undispellable)
Effect: Attract: Taunt all enemies continuously.
LT Formation
■ Activates only if self is alive.
LT Formation:
Function: Issues a battle-advantageous tactic to target(s).
Effect 1: Affects all allies from the same squad. Critical damage ▲ 23.51% continuously.
Effect 2: Affects all allies. Projectile explosion damage ▲ 2.32% continuously.
Bonus effects when applying AS Formation to self.
Effect 1: Affects all allies. True damage ▲ 30.97% continuously.
Effect 2: Affects all allies. Projectile explosion damage ▲ 3.09% continuously.
Effect 3: Affects self. Exposure activation disabled continuously.
Effect 4: Affects self. Recurring interval of Environment Setup ▼ 20 sec continuously.
Battlefield Formation
■ Affects all allies.
Battlefield Formation: ATK ▲ 40.07% of caster's ATK for 10 sec.
■ Affects self, if self is in Environment Setup status.
Enhances Environment Setup
Function: Enhances Environment Setup
Duration: 10 sec
Effect 1: Damage taken multiplier of Environment Setup is scaled by 100%.
Effect 1 Target(s): All enemies
Effect 2: Potency of HP restored ▲ 29.04%.
Effect 2 Target(s): All allies
Skill recommendations
Build
CUBES
Bastion if you have enough max ammo lines. Resilience otherwise since she is a slow girl to reload.
OL GEAR
A bunch of her buffs are final ATK, so you can build her as a DPS unit. ATK, Elemental DMG and max ammo capacity take priority. Anything else is just filler, no need for Hit Rate since she is a Machine Gun.
Solo Raid Usage
This is based on the top 50 players of all NIKKE servers combined. Data is from enikk.app, check their website for a lot more raid data.
Pros & Cons
- When paired with Eunhwa: Tactical Upgrade, they are great supporters that can be used on any type of content even if her buffs are oriented towards True Damage and RL/SR
- Both of them are pretty cheap to build if you just want them to 'work', since you can go 4/7/7 and stop there until you get more resources
- Her sustain is the best in the game when it comes to duos (bunnies, JKs, etc.) since it has 100% uptime
- Without Eunhwa: Tactical Upgrade she will kill herself, since she has a screen wide taunt, you also lose part of her kit so not worth using unless both are together