I can try this out! ;-; I think I should make some punishments for the Danganronpa OCs you have >:)
Ayame - Trapped inside a soundproof and darkened "tea bag" with limited air and dunked repeatedly into scalding hot water.
Hayato - Dropped inside a very deep pool of water with a black covering on it. There are holes in the covering. Above each hole is a boxing glove, and each fires at random. If the person stays too long in one hole they will get whacked. Switching holes by swimming or going underwater can help with dodging. It is "whack-a-mole" in a pool of water, and the main objective is to get the person to completely give up.
Miku - Beaten by a giant whisk and thrown into an oven.
Rin - Pelted by hail and acidic rain.
Ryūji - I think it would be a crime to not have them get eaten by a giant dinosaur.
Sachiko - Something involving a tightrope. I don't know what, but it must be ✨spectacular✨.
Suzume - Dropped inside the mouth of a giant mechanical sparrow chick. I literally copied this from A Bug's Life but I thought it would suit their character.
Tsubasa - Sliding down the blade of a giant ice skate, into a vat of lemon juice.
Yuu - Probably killed by a clown lol
The ones that I missed because I had no idea - Kohaku, Masahiko, Shion