Jet functions as Yukke’s mechanical companion, providing technical and logistical support during desert treasure-hunting ventures. Distinguished by polished etiquette and an air of sophistication, it contrasts sharply with its counterpart, Dram. Originally designated "Dram-3," the robot vehemently rejects this title and resists activating its Dram-3 form, which forcibly reshapes its lower chassis into a plasma cannon—a modification it finds physically disconcerting and aesthetically displeasing.

Like others in its series, it operates on water-based energy systems. Its rapport with Yukke blends pragmatic assistance with assertive individuality, often prioritizing the preservation of its dignified self-image over adopting functional modes it considers inelegant or undignified.