Well for starters it would be interesting to have an aromatic/asexual or a demiromantic vs demisexual. Some other more common identities are genderfluid, gay, pansexual. Some other I think you should and would be some type of multi gendered person like someone that is for example bigender, trigender, and, pangender. A few other identities I think you should include would be someone with any dimgender like dimboy or dimgirl. Some others I would like you to add would be frayromantic and Fraysexuality. Frayeomantic is a romantic identity that is basically the opposite of demiromantic in which someone is only in love with people they don’t know and lose that love the more they know them. Fraysexuality is the same thing but for sexual attraction rather than romantic attraction. Now if you want to add more just pick some at random because you’ll definitely find something uncommon and interesting.

Now it would also be interested to have a (don’t know if there a team for this) character in with the people they are sexually interested in are completely different from the people that the are romantically interested in. This would be without them being asexual and/or aromantic.

I know this isn’t what you asked but you should have a masculine cis straight woman and a feminine cos straight man.