So, this is a bit different since he's not part of the Idiot Value Pack of Three but I have a couple of Spinner head cannons I need to share, it's not worth making a full book about mha headcannons though because most of my headcannons are The Idiot Value Pack of Three but here ya go, Spinner headcannons:

1. He can't eat ice or have it in his mouth, it he does try to eat it he ends up looking like he just tried to eat a lemon.
2. He's scared of vacuum cleaners as his scarf got caught in one once and he nearly choked.
3. His claws are surprisingly sharp and he can use them as a second weapon if needed.
4. Like Tsu, he goes into a mini hibernation if it gets too cold.
5. He is protective of Magne and will slap/stab you if you insult her.
6. He was out going shopping one time and he made friends with Pony Tsunotori after helping her reach some stuff on a high up shelf, they were both pretty shocked to see each other at the attack with the Wild Wild Pussycats
7. Speaking of which, he always has and always will despise the cats.
8. He has a shrine dedicated to Stain in his room
9. He tried to recreate the Game of Thrones throne once. It was more painful to sit on then he imagined.
10. Sometimes he'll just...lay down. Like, Toga or Twice or someone will walk into the bar and he'll just be lay face down on the ground (honestly I relate)
11. He gels his hair, when it isn't gelled up it falls down over one of his eyes.