Usagi is a clumsy, ditzy 14 year old girl who gets god-awful grades in school. She loves to eat, and sleep. She whines alot, and cries alot...but by the end of the series she was alot tolerable. Usagi and Rei are constantly on each other about something. In the past, she was Princess Serenity of the Moon Kingdom. And in the future, she becomes Neo-Queen Serenity of Crystal Tokyo. Neo-Queen Serenity of the future is married to Mamoru, also known as Tuxedo Kamen. Their child is Chibi-usa(Rini).

Moon Prism Power
Usagi says this to activate the locket that turns her into Sailor Moon.
Moon Crystal Power
Usagi says this to turn into Sailor Moon, after her first transformation locket is destroyed.
Moon Tiara Magic
Sailor Moon's main attack, saying these words, she turns her tiara to a frisbee and throws it at Monsters, either destroying them or stopping them.
Moon Healing Activation
With the Cresent Moon Wand, Sailor Moon can heal those who were turned into monsters.
Moon Sceptre Elimination
Sailor Moon uses the Moon Sceptre to turn monsters into Moon Dust.
Luna Pen
Serena says "Disguise Power!" to disguise herself to go places where she normally couldn't go.
The Emperyium Silver Crystal (has about 1,000 othe names)
This is the key to the universe, and Sailor Moon has it; This Crystal heals, destroys, turns Usagi into Sailor Moon, and probably slices, dices, and makes julienne fries. :)