Koukuji_Family MOOOOOOOOOOOOON
As the daughter of Neo Queen Serenity and King Endymion, Chibiusa lived a relatively untroubled life in the 30th Century Crystal Tokyo. She played often with the likes of the Sailor Scouts, Sailor Mars, Sailor Jupiter, Sailor Venus and Sailor Mercury. However, her idyllic life is interrupted by the Black Moon Clan, led by Wiseman.
When Neo-Queen Serenity is frozen in a quartz tomb, Chibiusa is sent into the past by Sailor Pluto and warned not to return to the future before she can figure out a way to save her mother with help.
...Then she falls from the sky, lands butt-first on Usagi's head, accidentally smooches her boyfriend, and the plot kicks off. Not going through the whole story, watch the goddang show, especially now that a new dub is currently ongoing.
Chibiusa is usually very upbeat, extroverted and outgoing. Though she started out socially awkward, she quickly became popular with her classmates. Her initial shyness could be attributed to the fact that she was teased in the 30th-century for not having any Soldier powers. She gradually matures, becoming more comfortable with herself and more confident with her Soldier abilities. Because her dream in the manga is to become a beautiful lady, her actions often are based around this. She tries to be a perfectionist and starts off trying to do everything alone and for herself. This view evolves as she realizes what maturity really is and what it really means to be an adult.
Also she transforms into Sailor Chibi Moon, but you probably already knew that.