Jun Jun is a character from the fourth season of the Sailor Moon anime, Sailor Moon SuperS, where she serves as a member of the Amazoness Quartet, a group of villains working for the Dead Moon Circus. She acts as the group's acrobat, and her skills are reflected in her lean, athletic build and her role as a tightrope walker.

In terms of appearance, Jun Jun has tan skin and long, light green hair that is styled into three distinct ponytails, with one pointing upward and two flowing down at the sides, tied with brown bands. Her outfit consists of a green two-piece loincloth-style bikini top, pale mint green baggy pants, and green sandals. Among the four members of the Quartet, she is the second youngest and second shortest, only slightly older and taller than Ves Ves.

Personality-wise, Jun Jun is the definitive tomboy of the group. She is described as athletic, impulsive, and somewhat vulgar, often using very informal, masculine speech patterns that give her a rough and streetwise edge. In the anime, she frequently speaks with a hard tone and, outside of her circus costume, tends to dress in biker-style outfits, although she is never shown actually riding a motorcycle. Despite her tough exterior, she exhibits a peculiar kind of sportsmanship or pride in her work, as she sometimes prefers to let her targets reach the peak of their dreams before she moves to steal their Dream Mirrors.

As a member of the Dead Moon Circus, Jun Jun's primary motivation is to serve her leaders, Zirconia and Queen Nehelenia, by hunting for the Golden Mirror that contains Pegasus. The members of the Amazoness Quartet are fixated on the idea of eternal childhood and are wary of the responsibilities and loss of dreams that come with growing up, which fuels their actions throughout the season. Jun Jun pursues this mission by confronting the Sailor Guardians and innocent people, using her unique combat style which involves hitting bombs towards her enemies with a baseball bat and summoning monster servants known as Lemures to do her bidding. Unlike her comrades Ves Ves, Cere Cere, and Palla Palla, the Lemures Jun Jun summons are consistently male and are often fish-themed.

Key relationships within the story are primarily with her fellow members of the Amazoness Quartet, with whom she works closely despite their individual rivalries and chaotic dynamic, as well as with her masters Zirconia and Queen Nehelenia, whom she eventually rebels against.

Throughout her role in the story, Jun Jun and the other members of the Quartet are eventually powered up by Queen Nehelenia to fight the Sailor Guardians directly. They battle inside the circus tent but are defeated by Sailor Moon's attack, Moon Gorgeous Meditation. Later, after they attempt to force Sailor Chibi Moon to summon Pegasus, they are betrayed and trapped in mirrors by Zirconia, who drains their strength. This betrayal opens their eyes to Nehelenia's manipulation. In a pivotal moment of development, Jun Jun, along with the others, makes the conscious decision to smash her dark green Amazon Stone. This act symbolizes them giving up their desperate hold on eternal childhood and breaks Nehelenia's control over them. Following this redemption, they assist the Sailor Guardians by switching the Golden Crystal and giving it to Super Sailor Moon, helping to defeat Queen Nehelenia. By the final episode of the season, the Amazoness Quartet chooses to leave quietly, expressing a desire to see the Sailor Guardians again someday.

Regarding notable abilities, Jun Jun wields a green Amazon Stone, which is the source of her power. She can use this stone to forcibly extract a person's Dream Mirror, which is necessary to find Pegasus. In combat, she performs specific attacks with her stone, including Rolling Ball, Through Ball, and Colliding Ball. Through Ball, for instance, allows her to teleport out of a mirror she was trapped in. She is also capable of creating illusions to confuse her opponents.