Naegi- Mint chocolate chip (Only the green one, not the white one)
Kirigiri- Vanilla
Togami- Also Vanilla, but he doesn't like ice cream
Fukawa- Huckleberry
Mukuro- Raspberry Sorbet
Junko- Also Raspberry Sorbet
Mondo- Rocky Road
Ishimaru- Vanilla
Sakura- Neapolitan
Asahina- Strawberry
Hagakure- Pistachio
Celeste- Matcha
Yamada- Literally anything Ben and Jerry's
Leon- Cookie dough...I dunno?
Sayaka- Bubblegum, the nasty Coldstone bubblegum
Chihiro- Strawberry :>