<P> Chibiusa (ちびうさ, Chibiusa or "Chibi - usa", renamed "Rini" in some English adaptations) is a fictional character in the Sailor Moon manga series created by Naoko Takeuchi . She is also one of the main characters of the series . She is introduced in Chapter 13, "Conclusion and Commencement, Petite Étrangere", first published in Nakayoshi on February 3, 1993 . She is a small child from the 30th century who travels to the past to seek help from the Sailor Soldiers . She later returns, a few years older, in order to train as a Soldier herself--Sailor Chibi Moon (セーラー ちび ムーン, Sērā Chibi Mūn), translated as "Sailor Mini Moon" in the DIC and Cloverway English adaptations . </P> <P> Chibiusa's birth name and official title is Princess Usagi Small Lady Serenity (うさぎ S (スモール) L (レディ) セレニティ, Hime Usagi Sumōru Redi Sereniti). She is adopted as a member of her mother's family, using the alias Usagi Tsukino, in the 20th century . She is given her nickname to differentiate from the older Usagi Tsukino, Sailor Moon . The nickname is a combination of chibi (meaning small person or small child) and her given name, Usagi . </P> <P> Author Naoko Takeuchi describes Chibiusa as a precocious person who likes pulling pranks . She is the daughter of Neo-Queen Serenity and King Endymion . Her real name is the same as her mother's, but is called Chibiusa in Japanese to avoid confusion between the two . Her name in several English - language versions of Sailor Moon, Rini, is a diminutive of "Serena", the name of her mother . She is known for having pink hair put into a unique style that resembles rabbit ears on top of her head . Chibiusa's hair is apparently truly pink, and not just colored that way for stylistic purposes; its color is stated in the manga's first Picture Diary and in the poem about her in the Sailor Stars CD single . </P> <P> Exposure to the Silver Crystal renders all of Crystal Tokyo's inhabitants functionally immortal, and her frequent time traveling further complicates approximation of her age . </P>

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