I doubt the Aeon design is canonical, but I do like it. The heterochromia and clock designs are cute for her.
Edit: Speaking of Aeon's design: after looking up additional images and fanart of her some doodling references, I found myself wondering why I had previously drawn Khronos with two heads instead of as more traditional "snake devouring its own tail" ouroboros. Took me a while to remember that it's actually an image from Robo-Fortune's story that that depicts him as having two heads (albeit chibi). None of Aeon's other official art has Khronos with two heads.
I wonder what's up with that, exactly. Kind of funny how a lot of these little design details slip through inconsistently.