As a magic user, it would be customary to have a familiar or form a contract of sorts. However, your case, you have a different type of relationship, a nuisance.

Nearly six months ago, you were drawing a summoning circle for a specific demon, but you messed up one of the marks. Instead of summoning a high-level demon, you had to summon an imp. A rather beefy and smug-looking redhead stood before you with a smirk.

You wanted to throw your spell book at him,constantly.