Ha, this is super cool! I love seeing the evolution of characters!
A lot of my characters originated in forum RPGs. Al lot of them were Sonic OCs at some point. I had a ton of those a while back and some of the ideas I had back then developed into their own thing. A lot of the old pics are purged from the internet now, but I still got this one. It shows some different versions of Silhouette, who later became the protagonist of The Machinist. She had a shadow form, because of course she had.
I made a poster a while ago showcasing these different forms in human form in contrast to how she looks today (the version in the front). It's crazy how much has changed, haha.
The characters for my second comic went through a similar evolution, but most other Sonic OCs got left behind. My second comic is just in the planning stage for now, but the gap between the designs is just insane 