Prestige Star of Heaven (Summer) A: Apply Ignore DEF (3 turns) & increase ATK [20%-30%] (3 turns) & C. Star Gather Rate [3000%-5000%] (1 turn) for yourself
Cooldown: 8/7/6

Desire for Approval in Summer B: Increase Quick Card effectiveness [20%-30%] (3 turns) & apply a state that increases Quick Card effectiveness [10%] (Max 10, 3 turns) when HP is restored or when Max HP is increased (3 turns) & apply Evade (2 times, 3 turns)
Cooldown: 8/7/6

Chained Horses (Possession) A: Increase NP Gauge [20%-30%] & Critical Strength [20%-30%] (3 turns) & Critical Strength [50%-100%] (1 turn) for yourself + Gain [10-20] C. Stars
Cooldown: 8/7/6

NP:
Great Advent: Fierce Assault of the Chained Horses A [Quick] - Deal [Lawful] Special Attack damage [NP: 600%-1000% * OC: 150%-200%] & 30% chance to inflict Stun (1 turn) & decrease Critical Rate [20%] (3 turns) for all enemies

Passives:
Madness Enhancement EX: Increase Buster Card effectiveness [12%] for yourself
Phantasmal Possession C: Increase Buster Card C. Star Gather Rate [10%] for yourself

Append 3: Increase Critical Resist against Assassin enemies [20%-30%] for yourself

Bond CE:
Huh? Don't Tell Me: Increase Quick Card effectiveness [10%] & apply Special Attack [Lawful] [10%] for all allies while Huyan Zhuo (Berserker) is on the field

Is she usable?

This grown ass woman is so desperate for your attention she wrote a self insert manga specifically about it. Would you date a woman that looks like this and was that desperate?