I do not own Blue Excorist or BHNA- (Boku No Hero Academia) All of this is complete fake.. Most likely all of the characters in the both anime/manga are going to have completely different personalities. In this story.. Bakuogu and Rin are kinda the same. (Considering that they have the same voice actor.) As you know Rin and Yukio's father is actually Satan, But! Bakuogu has a different situation. Bakuogu is actually born from the Grim Reaper. (I don't know a name for the Grim Reaper for now just call him Reaper..) Satan had to sent Rin's brother Yukio to the surface world since he wouldn't survive in the underworld.. Rin and Bakuogu grew up together but... They are trouble makers.. If they were to go up to the surface world they will surely cause havoc..! This is a Rin x Bakuogu story.. My include smut I don't know...~