*takes a deep breath*
Prepare for the list of doom: Sokka and Katara for sure went ice skating because Water Tribe, baby and Sokka tried all. the. food. Azula acted like she didn't want to go and went anyway. Was pouty because she can't ice skate and also it's cold. Refused help.
Ash would go with Eiji and be an adorable couple. Don't let him near the shooting games.
Pike could have been persuaded on a tentative date with Scanlan and generally enjoyed all of the festivities.
Haikyuu boys were there with whoever dragged them XD Iwa was likely with Oikawa unless he wandered off with someone else. Semi was adorable with Mafuyu. Tanaka was probably with Asanoya.
James cleaned out all the games that he could. Your bed is now dominated by cheesy carnival prizes, you're welcome Lily.
Jirou hung out with Denki and the cats while writing some music and wandered off to get coffee once in awhile. Dabi is free for harassment.
Cherry was likely there doing some calligraphy thing and to be mom to Miya.
Star played all the games and was sad Mimi isn't here. Ice skated forever and was a showoff because that's Star.
Kotetsu of course was there to ice skate with Kaede and be a cute dad. Did the corn maze and possibly someone had to go find him.