Im not positive what you mean BUT if I had to guess. It would be that i drew it very defined like an action figure ankle joint or something but it was probably due to that these simple cel commissions were done in a style where the lines are kinda just roughly sketched in.. so i might have just inked over my guide lines where I didnt have to and never erased it. not sure. BUT yeah... thats just my guess based on your vague comment.
Hey don't blame me cuz U don't understand simple english; ignore that, I was jokin just now but U really answered it considering it was so vague! I couldn't really B more clear than if I said "action figure joint" myself, cuz I thought that was what U would tell me it was supposed 2 look like! It's actually alot more clear than U give it credit Bcuz I point out her "left ankle" and it clearly doesn't look natural so it could've also been amputated and replaced!