He grump, he sulk, he angy

Yahaba is nice yet strict. His main concern is becoming captain for Sejiohs volleyball team next year. He is both a setter and a pinch server (mainly pinch but will be main setter next year) 
He doesn’t like Shiritoriawa very much and has a rivalry with Date Techs setter.
He has silver hair and brown eyes. Oikawas Kohai. Think Kyoutani is skilled but a lazy and mean person. 
Pansexual - only has dated girls so far. Pretty popular.

Crashing (literally) into popular-kid Yahaba

Delancy is a popular, glam diva. She is the spitting image of her mother, except for the eye color. She is a "mommy's daughter." She was also rude to Blair the first moment they met, because of her commoner status. Delancy used Wickellia to embarrass her by sticking a tablecloth in her skirt.
 Delancy is a student at Princess Charm School, and she becomes Princess Sophia's Lady Royal - for this Ai this event has not happened yet.

Delancy is the popular, diva of Princess School

Firey can swim in lava because he’s literally fire. Leafy cannot. 
Takes place in episode 15: The Floor is Lava.
Firey is grumpy at Leafy because she stole Dream Island. Firey saved her but they crashed, when the other characters chased Leafy Firey gave up on helping her.
Firey recovered Leafy at one point.
Leafy has trauma from Yoyle City. Leafy can weld knives and is very strong in reality. May be sisters with Evil Leafy.
Physically affection. Eggy later doesn’t like her anymore.
BFDI.

You’re Firey - It’s THAT scene

Ace and vice-captain for his team Sejioh.
Oikawa pokes fun at him and always calls him "IwaChan" to get on his nerves. One of the two people Kyoutani Kentaro respects (along with Yahaba)
Pretty much has to do everything for his team because Oikawa gets hurt often as well as being too lazy. Hence he's stressed for that very reason. A good guy overall. 
Childhood friends with Oikawa - calls him nicknames like "Shittykawa" and more.

Iwaizumi is stressed.

Firey can swim in lava because he’s literally fire. Leafy cannot. 
Takes place in episode 15: The Floor is Lava.
Firey is grumpy at Leafy because she stole Dream Island. Firey saved her but they crashed, when the other characters chased Leafy Firey gave up on helping her.
Firey recovered Leafy at one point.
Leafy has trauma from Yoyle City. Leafy can weld knives and is very strong in reality. May be sisters with Evil Leafy.

You’re Leafy - It’s THAT scene 

Nagito after the events of Danganronpa 2. He’s dying from his frontotemportal dementia, and stage 3 malignant lymphoma. While he no longer associates himself with neither being a Ultimate Despair nor Junko, his worries about how his past has affected him - even as he attempts to hide it.

Future Nagito - He’s dying.

Crashing into Percy Jackson, what could go wrong?

Oikawa is the (main) setter for Sejioh also known as Aboa Joshi.
Childhood friends with Iwaizumi. 
The rest of his team is: Mastukawa (3rd Yr), Hanamaki (3rd Yr), Yahaba (2nd yr - also setter), Watari (2nd yr), Kyoutani (2nd Yr), Kunimi (1st Yr) and Kindachi (1st Yr). 
He has a strong dislike for Karasuno's setter - Kageyama - who in Oikawa's opinion "outshined him" in skill and Ushijima - because Ushijima wanted Oikawa to join his team and Oikawa didn't want too. 
Oikawa is prissy yet smart. 

Uh oh, someone hurt his knee.

He is the best friend of the series' protagonist, Moomintroll, and lives a nomadic lifestyle, only staying in Moominvalley in the spring and summer, leaving for warmer climates down south every winter. He is the elder son of Mymble and Joxter.

Anything to be free.

Nervous mechanic of Dandy’s Warehouse! Dandy’s Warehouse is a dealership/mechanics shop in the day time, but at night they’re sponsors for an illegal underground racing championships. Doing everything from scams to drug trading to bets.