Given that you think you 'look right,' that tells me this is a form you're familiar with. That means it's either your own or it's someone else you know.

[Why is she even trying to get to the bottom of this? Midna feels annoyed that she's dug this deep. Sentience's form doesn't mean diddly to her and has absolutely no bearing on anything she might want for herself. Maybe it's just the satisfaction of knowing.]

Not that it matters either way. Seems your grand mystery of identity is solved.