Exclusive Principles
An Exclusive Principle is a character’s signature leader effect (players from other HoYo games may know this as a Law). The active leader’s Principle triggers at the start of battle.
Known Principles

Advance Bravely?
HuaIf an allied Furrari is on the field at battle start, it is buffed: after its Active Skill it can knock its target off the battlefield (Energy cost +60; control-immune targets instead take 400% ATK Physical DMG). If no Furrari, the strongest ally's Max Health +20%.

Brilliant, Shining Party?
Maple ManybellWhen battle starts, Maple throws 2 dice; allies gain a buff based on the result (matching faces boost it 20%): Sweet Protection (+12 Armor & MR), Sweet Shout (+6% ATK & MP), Sweet Urging (+6% Attack SPD), or Sweet Strike (700 Magic DMG to 2 random opponents).

But One Encounter?
Kumyo KyoMnemobiblion gains 1 exclusive Relic and enters battle immediately after the start.

Butterrific Butter?
BreadheadAfter battle starts, bread continually falls over the battlefield, turning opponents hit into bread.

Competition's Crown?
Sir ChampionMark a hex in the allied half during prep; after battle starts, drag the lowest-Health enemy Anima there, Stunning them 1.5s and increasing DMG they take from allied Competition Anima by 40%.

Deadpan Desperado?
Cassio RollexIf an allied Kaffiend is on the field at battle start, it is buffed (stacking Attack SPD per Skill use, Basic Attacks deal 5% Max Health Magic DMG, +25% Max Health, +15% size). If no Kaffiend, the strongest ally's ATK +20%.

Ephemeral as Dew?
BladeOnce per battle: Blade protects the strongest ally. 2s after they are defeated, heal them for 35% Max Health; on revive, Stun all opponents within 2 hexes for 1s.

Forged in War?
Jalily BelauWhen battle starts, deal 30% Max Health as True DMG to a random enemy unit.

Hell is Other People?
ParayayaGrants a Hate Pendant: every 4th instance of DMG, release 3 bats at 3 random opponents (80% MP Magic DMG each). If unassigned after battle start, the strongest ally equips it.

Like a Light Unto the World?
PrabhasActivate Shining Light once at battle start: allied ATK and MP +16%; Light Anima gain an additional 20%.

Man's Best Friend?
KianaWhen battle starts, Kiana summons a Puddliking to the allied front line to assist in battle.

Novarch Tea Party?
HungrilleWhen battle begins, allies gain 12% Omnileech and regenerate 2 Energy/s (+50% for Satiation Anima).

Petals Worth Plucking?
ArmandWhen battle starts, allies in Umbral Shroud can Terminate opponents below 10% Health; Dark Anima can Terminate below 20%.

Small-Town Girl?
NanafeyWhen battle starts, buff the ally with the highest MP: +3 Energy every 2s and +18% Magic DMG dealt until end of battle.

Sweet Rain?
BreadheadAfter battle starts, cakes fall over the battlefield and turn into Vulberries that decay and continually throw cakes at opponents.

Up You Grow!?
BreadheadAfter battle starts, all allied units grow larger and gain buffs.

Walk With Love?
Parayaya, the Sovereign of Love and HateWhen battle starts, smash the Love/Hate Gem into the center of the field, dealing 20% Max Health as True DMG to all enemy units.