(Funny Trope) Character is completely immune to another character's powers for a very specific reason

[u/Vast-Tangerine-6771]

Teodora vs Ghost of Medusa (Legend Quest)

Medusa (who as a ghost can only petrify other ghosts) failed to petrify Teodora because it would be later revealed that Teodora isn't actually a ghost but instead an astral projection

Usopp vs Perona (One Piece)

Usopp can't be made depressed by Perona's hollows because he's already depressed giving him the upper hand that no one else has

[u/MCTech24_00]

Bit of a sad one but

Dean is immune to famine’s power because inside he’s already dead

[u/todofwar → u/MCTech24_00]

Gods the writing was strong then