It's not really a quirk (but yeah sure let's go with that)
The “Izuku is a witch who was practically raised by werewolves” AU that no one asked for.
Starring: A supernatural world hidden from quirk society. Izuku’s a confused cinnamon roll with no social graces other than those learned from werewolves. Bakugou wants to be alpha of the class pack, Sero thinks Bakugou’s too controlling, and Kirishima just wants everyone to be friends. Todoroki tries to not have a coronary when Izuku appears by his bed at night, Tokoyami teaches Izuku how to meditate, Iida has to give Izuku Sex Ed... and basically, no one has any idea what they’re doing at any point in time.
Except Aizawa. Their “pack leader.”
Oh wait. Izuku keeps getting Aizawa to pet his head in front of other faculty members and has definitely slept at the foot of Aizawa’s bed.
So... scratch that. Not even Aizawa.