Grim

Grim is a major character in Episode 1. He is at Orchid Bay and has lost his legs at first.

A Skele-ton Of Issues
After Boomer retrieves Grim's legs from a Fusion Spawn, Grim tells Boomer to head to City Point to help Gumball.

E-Race This (Part 3 of 4)
Once Boomer returns to Orchid Bay, Grim's scythe has now been stolen by Fusion Grim. Once his scythe is returned to him, Grim helps Boomer and Gumball locate.