This is in the order of the seating arrangement.
Aoyama: Gay. No further explanation needed. (Asexual)
Mina: Cupioromantic. It means she has a desire to fall in love, but can't.
Froppy: Lesbian? Or maybe Bi. Trans.
Lida: Bi, asexual.
Uraraka: Pan.
Ojiro: Straight, definitely an ally. Demiboy.
Denki: BI DISASTER!! (Almondromantic)
Kirishima: Gay af.
Koda: I have no idea, maybe aro/ace.
Sato: Gendervoid. Probs asexual gay.
Shoji: Omnisexual, aromantic.
Jirou: Bi. Periodt. Demigender.
Tokoyami: Omnisexual demiromantic.
Sero: Gendervoid graysexual gay.
Shoto: Bi. Half of him is straight, half of him is gay. (Please don't cancel me.)
Hagakure: I honestly have no idea. Maybe Bi? Could be Agender.
Bakugo: Gay demiboy.
Deku: Unpopular opinion; but he's straight.
Mineta: Bi.
Momo: I have no idea. On one hand, she might like Shoto. But, on the other hand, what if she likes Jirou? I can't imagine her being bi so, IDK. Maybe unlabeled.