Jun, designated G-3 and codenamed "Swan," operates as her team’s electronics and demolitions specialist. Her Bird Style uniform combines a pink sleeveless mini-dress with white gloves, knee-high boots, and a swan-themed helmet fitted with an antenna. Outside missions, she runs the Snack J café—a hub for team gatherings—and shares a home with her adopted brother Jinpei. Born to a Japanese-American family, Jun was orphaned early. Fleeing wartime fire-bombing, she discovered toddler Jinpei in the Jupiter Mountains, later raising him at the Shirayuki Orphanage under Dr. Nambu’s care. A contested backstory suggests she resided with an aunt until age 8–9 before losing her in another conflict. The 1994 OVA reimagines her origins: nuclear terrorists murder her parents, driving her to a protective motorcycle gang in her teens. This iteration depicts her as emotionally guarded, juggling modeling and ballet instruction while shunning romance. Skilled in data analysis, explosives, karate, and aikido, Jun pilots the G-3—a transforming motorcycle operable on land, water, and air, later enhanced with twin rocket launchers. The OVA redesigns her vehicle as a Harley Davidson-style bike that converts into a monowheeled hovercycle using a G-Bracelet. Her relationships shape her arc: a turbulent yet loyal sibling dynamic with Jinpei, complicated by reliance on his cooking; unspoken romantic tension with Ken, later acknowledged but sidelined by duty; and a pivotal confrontation with childhood friend Koji after he joins Galactor, culminating in her destroying his mecha. Interactions with Joe underscore mutual respect, particularly when she reaffirms his humanity post-cyborg revelation. The cancelled Imagi film offers an alternate path: orphaned in an accident, Jun lives solo as a bartender, devoid of ties to Jinpei. Concept art merges original and OVA uniform elements, showcasing civilian outfits like layered jackets and camisoles with varied hairstyles. Across adaptations, Jun embodies strategic calm and battlefield bravery tempered by empathy and maternal warmth. While core traits of independence and loyalty remain constant, her portrayal shifts with context—embracing the OVA’s psychological complexity or the original series’ emphasis on collective resilience.