Marinette: Straight and female
Adrien: Straight and male
Alya: Straight, maybe demisexual, maybe demiromatic and female
Nino: Straight and male
Chloe: Bisexual and female
Luka: Straight and male
Sabrina: Either bisexual or lesbian, maybe demisexual and female
Juleka: Lesbian, demisexual, demiromatic and transgender (mtf)
Rose: Pansexual, demisexual and female
Kim: Idk but male
Max: Idk
Mylene: Pansexual, asexual and female
Ivan: Straight, demisexual and non binary
Nathaniel: Bisexual, demisexual and transgender (ftm)
Alix: Idk but female
Marc: Gay and male
Nathalie: Straight, demisexual, demiromatic and female
Gabriel: Straight and male
Tikki: Pansexual, asexual and female
Plagg: Bisexual, asexual and male
Lida: Straight and female