These are just my opinions

Sam - Panromantic asexual - they/them - nonbinary

Kyle - Demisexual - he/him - cisgender

Nathan - Bisexual (prefers girls but wouldn't mind dating a guy) - he/they - cisgender

Will - Straight (curious enough to have dated Dan once, but wasn't really into it) - he/him - cisgender

Cooper - Bisexual - he/him - cisgender

Dan - Gay - he/it - cisgender

Elly - Bisexual - she/they - cisgender

Jane - Pansexual - she/he/it - bigender (male and female)

Faith - Gay - she/they (prefers they/them) - genderfluid

I cant think of anything for the Origins Gang, or as I like to call them, OG. Sorry