I have made a lot of designs, but only a handful have been given any kind of bio or even a name, and only a handful of those are being actively used.
I could go with the easy answer, my sona; she IS me, just as a character. It's for that reason that she has no bio.
But besides her, I made Bozard a lot like me and never even realized it, to the point where I almost consider him a second sona. Almost. Except obviously, I don't have wings. I'd still be bummed out if I did have weak wings, though.