Hi! Don't worry, you don't bother at all! <3 I don't think we specified it in the game, that's true. Although we did answer questions on social media, and referenced some of them with special illustrations for specific days like pride month and such.
I'll make a small list of genders and pronouns to clear up your doubts :)
Akane: cis female (she/her)
Maskeguy: agender (they/them)
Kyeran: cis male (he/him)
Arael: cis female (she/her)
Joe: cis female (she/her)
Hasiel: trans male (he/him)
Zihel: cis male (he/him)
Ariel: cis male (he/him)
Pin: cis male (he/him)