High School DXD

So you've chosen the High School DXD universe now all you have to do is choose your character. Is it an original character that you came up with on your own? Or is it a character from the High School DXD universe? Maybe its a cross over character where you take a character from another book, movie, TV show, game, manga, or comic and insert them into the High School DXD universe with the universal acceptance power. Make your choice.