ChibiChibi appears in the second part of Sailor Moon Sailor Stars. She floated down from the sky using an umbrella. Usagi first meets the tiny and cute girl in a park. ChibiChibi's umbrella blows away, but Usagi retrieves it for her. Later when Usagi is walking home, her and Luna realize that the girl is following them. Usagi asks ChibiChibi questions, but all she says in reply is "Chibi Chibi". ChibiChibi disappears, but when Usagi arrives home, ChibiChibi is in her house and Usagi's mother tells her not to leave her little sister ChibiChibi behind again! Usagi and Luna are shocked. Usagi and the others wonder if she is Neo-Queen Serenity's second daughter from the future, but Setsuna tells them that the Queen only has one child and that this child is not tied in with any Moon heritage. She also warns them about the girl saying that she might be dangerous, but Usagi doesn't believe her.

  ChibiChibi first became Sailor ChibiChibi-Moon when she touched Eternal Sailor Moon's rod during a fight with Sailor Aluminum Siren. In a vision, Sailor ChibiChibi-Moon floats toward Eternal Sailor Moon and the two touch hands. At that moment, ChibiChibi-Moon gives Eternal Sailor Moon her new power "Silver Moon Crystal Power Kiss". Though she has no transformation or attack, Sailor ChibiChibi-Moon does have a strange power to teleport the Sailor Soldiers into Galaxia's dimension. It also turns out that she is Galaxia's star seed and is the Light of Hope that the Starlights and Princess Kakyuu are looking for (Read the Sailor Wars Story). When Sailor Galaxia sent her star seed to Earth, it turned into a little girl that Usagi is destined to protect. Also, Princess Kakyuu is found hiding in the chalice that is guarded by ChibiChibi. In the end of Sailor Stars, ChibiChibi turns into the Sword of Sealing that Princess Serenity is supposed to use to destroy Chaos. However, Chaos breaks the sword and ChibiChibi dies. But when Chaos is banished, ChibiChibi comes back to life and returns to Galaxia.

Full Name: ChibiChibi
Name Meaning: No meaning (It literally means "SmallSmall" or "LittleLittle")
Age: Unknown (assumed to be 2 or 3 years old)
Birthdate: Unknown
Favorites: Doughnuts, sweet foods, dolls and toys
Dislikes: Unknown
Other Facts: Though she is Sailor ChibiChibi-Moon, she is not a part of the Moon heritage; All she can say is "Chibi" or mimic other small words that people say, such as "thank-you"; She is Galaxia's star seed and is the Light of Hope.