For the uninitiated, both concepts come from Jim Butcher's Dresden Files series. Sight or Third Eye shows people's true forms, usually in a metaphorical fashion and a soulgaze shows what that person's soul looks like, with their past, present and possible futures and innermost essences on view, unable to hide anything, usually only in a metaphorical fashion.
It doesn't need to be a supernatural character, but characters with some background and/or a decent amount of screentime are preferred so I can make some guesses as to what their essences are. Any of my OCS are welcome, too.