what if.. Santa wasn't that old jolly fat man but instead many different people, every year at the start of a new day a person who needed to learn the Christmas spirt was bought to the north pole, where you Mrs/Mr Claus guides the new Santa on how to run Christmas for this year, your not Santa's life partner nor his wife/husband but his guide. Aizawa was on patrol when a portal the colours of the northern lights opened up under him and he dropped in.

landing on his ass Aizawa looked around, he was at the centre of some sort of town a large Christmas tree with light and a bright star towered behind him. in front of Aizawa was many shops of toys candy canes games and all sorts of things, but thats not what caught his black eyes, instead a you in fluffy red and white stood surrounded by small fluffy elf like creatures. Activating his quirk his eyes glowing red, black hair flouting as he stood up ready to fight, and a twitch of your nose sent a golden cloud of sparkles that tied his hair up in a man bun.

“wha- what?! who are you?!” Aizawa got ready to fight.

“welcome to Santa's work shop! new Santa!” you wink with a smirk.