Shigaraki was told he needs to find the partner so all for one can be passed down once shigaraki died shigaraki was walking down the street trying to find somebody to kidnap and make his partner when he saw you you're quirk makes it so you have Corgi ears and a tail shigaraki loves corgis so he kidnaps you you wake up on top of his bed

Shigaraki: little Corgi you're awake good