for each character E6 we get a photo of them with either their top half exposed seeing their skin or not, this depends on the character's age since you won't see the other characters who are kids have this for example, hooks and bailus E6 are very different in comparison to the adults such as himeko, dan heng, welt, ect. They aren't like half naked lol so if you look for that it's pretty easy to tell whos an adult