
Thornefield |
Unity is in control of the Godmind and his digital constructs, and isn't subject to the fact that alignments affect the shape of outsider origins on the Planes considering the Godmind is kind of like a digital mindscape, not a plane. As digital constructs, he chose those appearances because he believes himself to be ultimately benign, and chose to depict himself as such based off the celestials from imagery of those he's extracted memories from over the centuries.
Take it as a kind of intentional presentation; how many people would follow him if he presented himself via hologram generators as an angelic being at the head of this army? He knows people respond well (generally) to celestials from his victims, and thus designed around such. Wolf in sheep's clothing in a way, though he does believe himself to be good in a twisted way.