Whichever is the most recent artwork of them really; my deviantart gallery is probably best for that: http://machinesbleedtoo.deviantart.com/gallery/
I change their designs every so often for funsies. Like Amzarah’s eyes are sometimes brown, sometimes golden, sometimes icy blue and leaking as an example. I like seeing people’s interpretations of my characters so I don’t really feel the need for refs, I guess, aha. I’m not stressed about people drawing them like 100% “correct” cos in my mind there’s no such thing!
Sorry I can’t be more specific. >___>