Oni
An evil monster from Japanese lore known for its hideous visage and brute strength. They loot and plunder villages, massacring the townspeople with their iron clubs. They have horns on their heads, red skin, long claws, and razor-sharp teeth.
Elemental affinity
Weak to:
Ice
Nuclear
Official data only distinguishes Weak / Resist — it does not separately flag Null, Repel or Drain like some other Persona games.
Battle Mechanics
1. Oni always has Absolute Counter: whenever it takes damage, it counterattacks with single-target Physical damage. 2. Each counterattack adds a stack; at 4 stacks it uses Hyakki Yagyo, dealing heavy damage to the whole party. 3. Each of Oni's turns, 1 Phantom Thief gains Oni Slayer, ignoring its Absolute Counter for 1 turn. 4. Defeating Obariyon grants the whole party Oni Slayer for 1 turn.
Source: P5X game data files (monster table), cross-checked with in-game strings — not a community guess.