Hmm ... I think I may have solved the mystery. I've narrowed it down to the only two characters who aren't part of the main cast.
ttrpg designer
trans / t4t / alloroace
(and not looking)
disabled / rat therian
partner of @Lark-in-ink
huge nerd since 1976
HRT since 1998
(art credit: @robinandcat)
Hmm ... I think I may have solved the mystery. I've narrowed it down to the only two characters who aren't part of the main cast.