The deathly Grim Reaper is forced to be best friends with two kids who constantly annoy him - happy-go-lucky Billy and his cynical neighbour Mandy - after losing an otherworldly limbo-dancing contest. With the help of Grim's supernatural powers, they get caught up in bizarre adventures which often land them in trouble.
BILLY
Billy is the sort of kid who can be happy no matter where he is. He’s naturally curious and enjoys exploring whatever environment he’s in, whether he’s having adventures in a foreign dimension or looking through his sock drawer. But Billy’s curiosity tends to get him into trouble he can’t get out of by himself.
MANDY
Mandy is an opinionated and occasionally cruel little girl. She is not afraid to share her opinion and usually gets what she wants through sheer force of her will. A creature of logic and order, Mandy loves power and control. In Billy and Grim, she has the perfect playmates: trusting, not-too-sharp pawns.
THE GRIM REAPER
The Grim Reaper is a supernatural creature thousands of years old. A distinguished, skeletal fellow with a Caribbean lilt to his voice, his previous job was to collect and deliver spirits to the underworld. Now, as a result of losing a limbo contest, Grim is forced to be best friends with Billy and Mandy.
HOSS DELGADO
Hoss Delgado roams the world seeking supernatural injustice wherever he fins it. When things get a tad too hairy for Grim and the gang, they bring in Hoss Delgado to mop up the (often gooey) mess. It would be an understatement to say that he and Grim are not the best of friends.
IRWIN
Irwin is Billy’s friend and constantly seems to end up with the wrong end of the stick. Always the last to jump on the bandwagon, Irwin would be happy to just make it out of childhood alive.
NERGAL
Nergal is a sinister creature who was banished to the centre of the Earth long ago. Though powerful and intimidating, Nergal wants nothing more than to simply have friends. Unfortunately, this is a task that he finds completely perplexing.
There’s no rest for the wicked… 
Series