agen
Short for agender. An identity of a person who doesn't identify with any gender, and usually describes it as having no gender. The term falls under the umbrella of non-binary identities.

They can prefer any pronouns.
These individuals often see gender roles as unnecessary, harmful or absurd, and can seek to solve this on a personal level, by not conforming to genders but also on a cultural level through the gender abolition movement.
The fuck is Mari supposed to be?
Umm. They are human. But they are agen if that's what's ur asking.