Firefly 
Destruction A member of the Stellaron Hunters, clad in a set of mechanized armor known as "SAM." Her character is marked by unwavering loyalty and steely resolve. Engineered as a weapon against the Swarm, she experiences accelerated growth, but a tragically shortened lifespan. She joined the Stellaron Hunters in a quest for a chance at "life," seeking to defy her fated demise.
HP
ATK
DEF
SPEEDBreak Effect Build
Best Light Cone
Firefly Best Stats
Firefly Best Substats
Firefly Best Relics
Firefly Best Teams
Firefly — Harmony Trailblazer + Asta + Lynx
A basic F2P-friendly Firefly team. Firefly is the main Super Break DMG dealer — she benefits from the Harmony Trailblazer (Imaginary) to increase her Super Break damage. Asta is a reliable free-to-play support for ATK and SPD buffs; Lynx provides party healing and sustain.
Firefly — Fugue + Ruan Mei + Lingsha (Break-focused)
Break-focused Super Break team. Fugue + Lingsha synergize with Firefly to maximize Super Break DMG; Ruan Mei further increases Break Effect and extends Weakness Break so the party can deal Super Break damage for longer windows. Lingsha provides AoE healing and Break amplification for sustained execution.
Skills
Deals Fire DMG equal to 0.5% of SAM's ATK to one designated enemy target.
Consumes HP equal to 0.4% of this unit's Max HP and regenerates a fixed amount of Energy equal to 0.5% of this unit's Max Energy. Deals Fire DMG equal to 1% of SAM's ATK to one designated enemy target. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 0.25%.
Reduces the target's waiting interval before the next action.
Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 30, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 0.5% and the Break DMG dealt by SAM to the enemy targets by 10%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
The lower the HP, the less DMG received. When HP is 0.2% or lower, the DMG Reduction reaches its maximum effect, reducing up to 0.2%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 0.1%. If Energy is lower than 0.5% when the battle starts, regenerates Energy to 0.5%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
Debuffs are negative status effects that render units weaker. Unless otherwise specified, debuffs can be dispelled.
Traces
Eidolon
When using the Enhanced Skill, ignores
While in Complete Combustion, using the Enhanced Basic ATK or the Enhanced Skill to defeat an enemy target or to Break their Weakness allows SAM to immediately gain 1 extra turn. This effect can trigger again after
When enemy targets' Toughness is reduced to 0, they will enter the Weakness Break State, which delays their actions.
Gain 1 extra turn that won't expend your remaining turns when taking action. During this extra turn, no Ultimate can be used.
Skill Lv. +2, up to a maximum of Lv.
While in Complete Combustion, increases SAM's Effect RES by
Ultimate Lv. +2, up to a maximum of Lv.
While in Complete Combustion, increases SAM's Fire RES PEN by
When dealing DMG, ignore a part of the enemy target's resistance to the corresponding damage type.