LuxAtro
I feel like Jugram Haschwalth from Bleach would be the perfect character to picture Atro's future appearence, since there are almost no pictures for OG Atro, and Jugram is totally perfect for the role.
Jugo is cool, and trust me, as a Bleach fan, he is super cool and all that, and I know there's not much art of the character Atro is based on, but I honestly prefer it to be like that with the slightly androgynous appearance to match his personality. Jugo's look is a bit too...stern/cold to match Atro's character. But thank you for suggesting it all the same