Boss

Boss (総長 Souchou) was a spirit who appeared early on in the anime adaptation.

Appearance
Boss appeared to be a bald muscular human-shaped ghost with a prominent cleft chin and a black moustache. In the anime he has parts of his motorcycle fused to his back.

History
Boss was the leader of a biker gang. They all died while riding through Honeido Tunnel when a rider at the front slipped on a banana peel and caused a crash.

Plot
Reigen mistook him for a pro wrestler and treated him to an Exorbitant Salt Punch.

In the manga, he was exorcised by Mob.

In the anime, he went on to rest in peace after Mob showed him an old photo.