[High Difficulty] Santa and Children in the Holy Night

If Nightingale (Santa) Defeated: "You can't get in the way of Santa!": Increase NP Gauge for all allies (including backline) by an extra 1 tick per turn (5 turns). [Unremovable]

Upon Break: "Okay, let's make a snow hut!": Apply Damage Cut by 30,000 to all allies (2 times, 5 turns).

Nightingale (Santa) will activate 0-1 of the below skills each turn:
- Santa's Present (Fun Toys): Increase Crit Strength and Crit Rate for an ally by 50% (1 turn).
- Santa's Present (Sweet Medicine): Restore 20,000 HP and remove debuffs for an ally.
- Santa's Present (Sweet Confections): Increase ATK for an ally by 50% (1 turn), x 2 stacks.

Upon Break: "It's getting cold...time for your vaccinations!": Increase Debuff Resist for all allies (including backline) by 30% (3 turns) and apply Evade (2 times). Decrease ATK for all allies (including backline) except self by 20% (3 turns).

If Nightingale (Santa) Defeated: "I will slice all of Santa's enemies": Increase DEF for all allies (including backline) by 50% (5 turns). [Unremovable]

Upon Break: "A snowball fight? I'm going to start first.": Decrease DEF for all enemies by 50% (5 turns).

If Nightingale (Santa) Defeated: "Chacha's present... How dare you!!!": Increase Crit Rate for all allies by 50% (5 turns). [Unremovable] * If Chacha is not on the field when Nightingale (Santa) is defeated, this skill will activate after she enters the field.

Upon Break: "Chacha wants to join the snowball fight too!": Increase own Buster Effectiveness by 100% (5 turns).