Super Sailor Moon Chibi (Chibiusa Tsukino) is one of the main characters of the anime series, Sailor Moon. She was born as "Usagi Small Lady Serenity" the only child of King Endymion and Neo-Queen Serenity and the Princess of the Silver Millennium. However, Chibiusa had stagnated in growth, being physically and mentally a child for over 900 years, something that is unusual for even the long-lived people of the Moon Kingdom.