In the anime
JunJun is the tomboy of the Amazoness Quartet, and an acrobat for the Dead Moon Circus. She has green hair and a dark green orb. She is the second youngest of the Amazon Quartet. Unlike VesVes, CereCere, and PallaPalla, the Lemures she summoned were always male (Jumper, Pakupaku, and Biribiri), and most of them are fish-themed. She attacks by hitting bombs toward her enemies with a baseball bat. She can also create illusions. Her circus act is tightrope walking.
JunJun made two individual attempts to find the golden mirror, and sent BiriBiri Yarou to help them as they all targeted the audience of a coming of age ceremony.
Eventually, JunJun and the others fought the Sailor Senshi inside the circus tent after being powered up by Queen Nehellenia, and were defeated by Sailor Moon using Moon Gorgeous Meditation. After taking Sailor Chibi Moon to try and ride Pegasus and take the golden crystal, they were trapped inside mirrors by Zirconia, until he teleported them out and drained their strength. JunJun, along with the others, smashed her dark green orb on the ground, giving up eternal childhood and releasing them from Nehellenia's power.Following the defeat of Queen Nehellenia (in which the Amazoness Quartet switched the Golden Crystal and gave it to Super Sailor Moon), JunJun was last seen in the final episode as the Amazoness Quartet decided to leave quietly and someday see the Sailor Senshi again one day.
In the manga
In the manga, the member of the Amazoness Quartet were actually the Sailor Quartet, those intended to protect Chibiusa in the future when Crystal Tokyo was in power. They were still sleeping when Queen Nehellenia sense their power, and used her dark power to corrupt the four Senshi, and they became the Amazoness Quartet. After they were destoryed, Sailor Saturn saved them (and their orbs) when the Dead Moon Circus was crumbling. Later, she asked Neo-Queen Serenity to revive them using the power of the Silver Crystal. They returned to their Senshi forms, and went back into sleeping, waiting for the time where they would be able to protect Chibiusa.
JunJun, now Sailor Juno, along with the rest of the Sailor Quartet, help Eternal Sailor Chibi Moon fight in the Stars arc.
- Her name, and her Senshi name (Sailor Juno), derived from one of the four major asteorids in the Asteroid Belt, keeping to the theme of our Solar System.
- She is the counterpart of Sailor Jupiter.
- JunJun has used her Amazon Stone the second least, with a total of three times in the anime and only one time in the manga, which comes to a grand total of four times.