I believe that it is Otcho, It would make sense ... I mean he has the long hair and everything (although realistically, after 14 years w/ no haircut anyone should have long hair, or be balding, after all they should be around 45 right now ...)
he probably mentioned about a hero saving the world to put in his manga which pissed Friend off then resulted 80 years of prison lol (but sadge) oh wait, I just checked. he wasn't one of the two mangaka guys in the apartment
cant believe he actually hid his pencil in his asshole lmaoo