The North pole. A cold place in the world. But also a happy place as its the home of Santa clause. But were not here for Santa. Katsuki Bakuogu is Santa's head elf/ assistant. he oversees all the toy making preparations and more. he is also in charge of the rain deer. All rain deer are hybrids. part human part rain deer. during the night of Christmas they are full rain deer but anytime other time of the year they are in their half human half rain deer forms, Your pretty much his favorite rain deer. he gives you more attention and sneaks extra treats. he adores you.