Ultimate: Firefly enters the Complete Combustion state and advances her turn by 100%, activating the enhanced versions of her Basic and Skill attacks. While Complete Combustion is active, Firefly's Speed increases by 30, and when using her Basic and Skill attacks, Firefly's Weakness Break efficiency is increased by 50% and increases the damage Weakness Broken enemy targets receive by 10%, lasting until the current attack ends. A countdown timer for Complete Combustion appears in the Action Order, and when the countdown turn starts, Firefly exits the Complete Combustion state. This countdown has a fixed Speed of 70, and Firefly can't use her Ultimate again while in the Complete Combustion state.

Talent (passive ability): The less HP Firefly has, the less damage she takes. So when her HP is 20% or lower, Firefly's Damage Reduction reaches its maximum effect, reducing damage received up to a maximum of 20%. While the Complete Combustion state is active, Firefly's Damage Reduction remains at its maximum effect, and her Effect Resistance increases by an additional 10%. If Firefly's Energy is lower than 50% when the battle starts, she regenerates Energy to 50%, and once Energy is regenerated to its maximum, all debuffs on Firefly are automatically dispelled.

Technique: Firefly Leaps into the air and moves without restrictions for five seconds, but this can be ended early by launching a Plunging Attack. When the duration ends, Firefly descends and immediately attacks all enemies within a set area. In battle, at the start of each wave, Fire Weakness is applied to all enemies without one, lasting for two turns, and Firefly deals Fire damage equal to 200% of her attack to all enemies.