Julivert Jenoh, commonly called Jiji, begins as a supporting antagonist in the Bravery Duet under Don Bossman during the Pompo Hills arc. He has a slim build, average height, and brown hair with three upward spikes. His attire consists of a sleeveless navy-blue vest, dark blue parachute pants tied at the hems, and two comforters secured around his ears with weight tape. Gold jewelry like rings, bracelets, and a belt, likely stolen, adorns him. White feather gloves enable his manipulation of Fantasia. His face displays a consistently dopey expression, with wide-open eyes, a partially open mouth, and a snot bubble often visible from his left nostril.

Air-headed and uncharismatic, Jiji rarely speaks, deferring communication to Don Bossman. His behavior frequently disrupts the Bravery Quartet's posing routines. Despite his foolish demeanor, he remains aware of his surroundings and shows no shame in his thieving sorcerer activities. He demonstrates cowardice and deception when necessary, such as attempting to flee an islet after Alma releases him and Don to aid her hunt. Jiji shows subservience to those he deems suitable leaders, faithfully following Don's commands despite enduring abuse and possessing greater magical potential than Don.

As a sorcerer, Jiji possesses innate superhuman strength and reaction time, sufficient to counter an enraged Seth during the Pompo Hills conflict, though he later fails to evade Seth's Fantasia blast. His primary magical ability manifests through the Bravery Shield, capable of blocking incoming attacks and inflicting damage upon contact. Don Bossman consistently praises Jiji's abilities as fearsome and superior to his own.

Following the Pompo Hills events, Jiji undergoes reformation alongside Don Bossman. They join Alma's crew as assistants after she saves them. He travels aboard Alma's home-ship to Cyfandir and Caislean Merlin, continuing to serve under her command in subsequent adventures.