The top one is Crona's sex so it's what he biologically is. Gender is what YOU process as. Crona has never clarified for us so yes it is unknown. Either way Crona is still my favorite. Right above Kid.
Consequences of Kagome fighting with InuYasha in a photobooth: They fight. He protects her from the flash. He tries to attack the camera. Kagome subjugates him to "sit" - screenshots from InuYasha movie 2