Jun the Swan, designated G-3, is the Science Ninja Team’s electronics and demolitions specialist. Born to a Japanese mother and American father, she was orphaned early and raised alongside Jinpei at Shirayuki Orphanage, later adopting him as her brother. Mentored by Dr. Nambu, both joined the team, with Jun mastering explosives and close-quarters combat. Her Bird Style uniform mirrors a swan, featuring a pink dress, white gloves, thigh-high boots, and an orange-visored helmet. Adaptations vary her design, such as the OVA’s brown bob cut and split-skirt ensemble. Her combat toolkit includes a reinforced, electrically charged yo-yo, the grappling Aurora Ribbon, and the energy-beam Elenettor bracelet. She conceals plastique explosives in her shoe heel and lipstick-case bombs. During *Gatchaman II*, her missile-equipped Auto Swan motorcycle is destroyed in action. Later iterations, such as *Jun: Apex Heart*, introduce her G-3 hover-cycle mecha for combating high-speed adversaries. Jun maintains a protective, almost maternal bond with Jinpei, co-managing their shared residence at Snack J while delegating household duties to him. A complex romantic dynamic with team leader Ken shifts from unreciprocated feelings to overt concern for his safety in *Gatchaman Fighter*, hinting at mutual affection. Her rapport with Joe oscillates between rivalry and camaraderie, culminating in her staunch defense of his humanity after his cyborg transformation in *Gatchaman II*. Expanded backstories diverge across continuities. The OVA attributes her parents’ deaths to nuclear terrorism, prompting her brief stint in a motorcycle gang before Dr. Nambu recruits her. A scrapped film concept re-envisions her as a Utoland bartender, orphaned and estranged from Jinpei. These versions underscore her resilience through trauma, with the OVA highlighting her emotional guardedness and pre-team vocations, including ballet and modeling. Spin-offs like *Jun: Apex Heart* spotlight her solo operations, emphasizing strategic ingenuity and combat prowess independent of the team. Consistently, her character merges tactical precision with emotional depth, anchoring the team morally during critical missions.