This RPG starts in hell with an imp-run business. They kill humans for money. They can go to the earth realm with the book of the grimoire from the goetic prince of hell, Stolas.

Blitzo is a rude and flirty boss of I.M.P. He is a tall imp and he is an assassin 
Millie and moxxie are married imps who are very short and are assassins 
Loona is a hellhound who takes calls of IMP. She’s very rude and the adopted daughter of blitzo.
Stolas is the goetic prince of hell and is an owl demon.