User blog comment:B214/Question and Answers 2/@comment-187.209.0.247-20140225185340/@comment-187.209.0.247-20140225224752

BUT, The desire to be the hero of the children and protect them along with his comrades and loved ones, implicate save the world from evil entities, and we must remember that currently issei is not only the Hero of the Underworld, he is also the Hero of the Youkais, because he saved Kunou and Yasaka, and Oppai Dragon TV Show is currently transmited in the Youkai world.

And his friends are Pure-Devils, Human-Devils, Dragons, Youkai, Angels, Fallen Angels, Valkyrie‎, Magicians Humans, Vampires, AND his parents are Normal Humans.