
Unlocks at: Phase 2
■ Affects self.
Critical Rate ▲ 26.04% for 10 sec.
ATK ▲ 20% for 10 sec.
Normal Attack Critical Rate ▲ 36.16% for 10 sec.
Unlocks at: Phase 1
■ Activates after landing 6 critical hit(s) with normal attacks. Affects self.
Crescendo: Critical Damage ▲ 24.79%, stacks up to 5 time(s) and lasts for 15 sec.
■ Activates after landing 8 critical hit(s) with normal attacks. Affects the target(s).
Marcato: Deals 88% of final ATK as additional damage.
■ Activates if Marcato lands as a crit attack. Affects the same target.
Deals 100% of final ATK as additional damage.
■ Activates when entering battle. Affects self.
Forcefully uses Skill 1.
Unlocks at: Phase 3
■ Affects random enemies.
Deals 544.5% of final ATK as damage. Attacks sequentially for 5 time(s).
■ Activates when Crescendo is fully stacked. Affects the same target.
Deals 544.5% of final ATK as additional damage.

Cube: Like most units in the game, Bastion and Resilience are the best options to run depending how many lines of max ammo you get on the OL gear.
OL Gear: Elemental damage and ATK take priority. After that crit lines benefit her A LOT for the extra damage on marcato. A couple lines of max ammo capacity are great since you can switch from Resilience to Bastion.