If you believe in this kind of thing and want to continue, there’s really no reason not to.
GJoub is classified as a demon (well as far as I understand it anyway), however, you are right, he fits better into the Spirit category of entities, and seen as completely harmless. This spirit is often summoned on for help, similarly that Christians will summon on Paul for help. The most common reason for calling on this cute little fella is with help in love, friendship – that kinda cutsie stuff.