Orca

Orca is, according to the Word of God, a 'childhood friend of Mayce'. In the first chapter and for the majority of the series, he lived with his girlfriend, Kobaedas, and was friends with Syo and Roze. However, the Hell Arc, it is said that he and Kobaedas are no longer together, he is in prison, and his head was eaten.

About
Orca was in the same class as Mayce, Kobaedas, and Simon.

In the first chapter, go to hell, meme, Orca dumps Mayce into the trash can for staring as he and Kobaedas are kissing.

Kobaedas
Orca and Kobaedas had been together long before the story began and are the first established relationship introduced. However, they have since broken up and Kobaedas has eaten his head.

Mayce
Orca, like all of Mayce's other "friends", is mean to him.