"Lesser" is obviously a nickname, though right now He uses it as a formal, proper name.

Lesser is a conjuror, he lives in an old, dark woods, filled with magical creatures (dryads, nymphs, feries etc). His home is a great white tower called "The Bonetower" since it's made all of ivory. Bonetower is a sanctuary for everyone who's able to work for Lesser, but only most persistent can endure Conjuror's whimsical personality.