He's a Casteless-by-choice second-generation Lunar so he's old as fuck and given that he lives in the middle of the Realm because he predates it that says a lot about him. I might make a Center-focused campaign just to have him show up, but that'll wait until I have the PDF for The Realm.

Might not keep any arm-markings, it would depend on how i do the rest of his spirit-shape--it's a therizinosaur/raiton (Archeopteryx sp.) chimera and hybridizing two animals we only know from fossils is a bit rough, even if the raiton half is more solidly designed in-setting.