The short black-haired character from the series Bishoujo Senshi Sailor Moon by Takeuchi Naoko. With the introduction of her character, she was quite an ill and lonely child. She is the daughter of Tomoe Souichi - a Professor. She also became close friends with Chibi Usa. Hotaru is revealed to be the final planetary Sailor Senshi, Sailor Saturn, who was sealed away because she had the power to destroy the world.
Hotaru's history consist of sporadic powers, fluctuating aging, and even being reborn as an infant. She is one of the characters whose outward appearance is mistaken quite often.