Maka: Demisexual Biromantic (she/her)
Soul: bisexual (female leaning, he/him)
Blackstar: Nonbinary bisexual (no leaning, he/they)
Tsubaki: asexual panromantic (she/her)
Death the kid: Demisexual Panromantic (he/him)
Liz: bisexual (no leaning, she/her)
Patty: bi-curious (she/her)
Crona: Nonbinary Demisexual Panromantic (they/them)*
Medusa: asexual aromantic (she/her)
Spirit: heterosexual (he/him)
Stein: asexual Biromantic (he/him)
Lord Death: asexual panromantic (he/him)
Ragnarok: Nonbinary Demisexual demiromantic (he/they)
Eruka: lesbian (she/her)
Marie: asexual Biromantic (she/her)
Giriko: heterosexual (he/him)
Sid: Demisexual demiromantic (he/him)
Mizune: asexual aromantic (she/her)
Ox: asexual Biromantic (he/him)
Archane: lesbian (she/her)
*it's somewhat cannon that Crona is Nonbinary, I think the creator made a tweet or something about Crona's gender but didn't specify if they were a male or female.