Idk if that was already considered but I would like to post this thought I had nonetheless
Autistic Shen Yuan! (Headcanon? AU? Idk idc)
Very deeply interested in monsters and beasts of PIDW/SVSSS verse, a bit struggling with social clues and recognize the emotions of others and himself (which now makes me think of alexithymia, but that's for different headcanon/AU)
Pretty sure there has to be a tag for it on ao3, but didn't check