Unique passive

Spell power +10%~20%. Fire skill/basic attack grants 1 stack Starlight; ice skill/basic attack grants 1 stack Moonlight. More fire attacks = more firepower but loses survival buffs; more ice attacks = more survival buffs but less firepower. At 5-dupe Kun starts with Starlight 1 / Moonlight 1. Using Star/Moon Cast in Dual Mode gives +1 element stack from the elemental attack plus +2 from Dual Mode, and the acquisition effect flips the opposite stack, so one of Starlight/Moonlight instantly hits 5 stacks while the other is fully lost, making the first-turn action extremely important. The unconditional spell power boost is nice but the passive is not easy to operate. With the signature weapon, thanks to Libra-Fire, even all-in fire is survivable via spell-power-based shields, greatly reducing the risk of committing to one side, so it is worth securing at least a copy of the exclusive weapon. Minor ally support via Libra buff is possible but hard to aim for. Note: like Witch Cameo, she cannot learn the ordinary Tri-Elemental Blast skill; unlike Cameo, this is because she is still in training.