Just one character, eh? I hope I've not posted here before but...
May I offer up Julia Wright? She's a gal with short hair and so androgynous as to nearly count as a "pretty boy". :P Or, well, man. "Pretty" is arguable and up to stylistic choices. Plus her setting has "supernatural" and "demon" themes (+ magitek arms), though you can't tell from her design unless you were to incorporate some shadow-monsters (demons) or sparks of electrical current.
S/He's gone through so much in hir life that s/he nearly counts as multiple characters. If it helps then...I suppose I'm mostly hoping for art of hir "headcanon appearance"? I.e. mechanical arms, masculine or somewhat androgynous clothes, no binder. I hope s/he strikes your fancy and if not then that's fine. :)