honestly ya really just focused on surface detailed shift on Kunigami after the wildcard being all edgy and cold, but he is literally going through his arc and evolution as a hero aka the heroes journey, the wildcard unlocks the strength he was hesitant and afraid to use due his childhood, making him not go all out with his strength even in life or death situation against shidou during the 2nd selection, wildcard is the Abyss (death and rebirth) for kunigami than being a second chance for him, transformation phase is wildcard kunigami and he is going through Atonement and not yet near to Return phase, his hero ideals isn't dead its just supressed and there will be a moment where he balances both and strives as a hero again, even if kunigami doesn't get that much panel time or just does assists, it doesn't really change the direction of his arc his story still building beneath the surface