Immortal_Orca
I have the feeling that koko and great red will become wonderful friends as it is stated in the manga Issei compared Great red's personality to that of a biker gang delinquent, claiming that Great Red travelled around the Dimensional Gap doing crazy moves and got aggravated at people that were staring at him.
It actually happened in canon. But it wasn't Issei who described him as such if I remembered correctly, it was Ophis.
camo:isnt that from the fanfic wiki? but i like that red more :D