Izuku:
Jumin Route. He really likes cats, has he been hanging around Shinsou?
Katsuki:
Zen route. He's just as narcissistic.
Shoto:
707 Route. This was pretty obvious but he really likes 707.
Denki:
Yoosung route, obviously. They're both blondes who are addicted to gaming.
Amajiki:
Jaehee Route. He likes that she's really formal.