is one of the central characters in the Sailor Moon metaseries. Her civilian name is , a sickly schoolgirl who can transform into one of the series' specialized heroines, the Sailor Senshi. She is the only human protagonist whose name is not Anglicized in the English dub, although the e sound in her surname is silent in the dubbed version.
She is known for making the fewest appearances in the anime, especially in her Senshi form, and has never appeared in any of the animated Sailor Moon films.
Hotaru is first introduced when she becomes friends with Chibiusa. She did not have friends until she met Chibiusa and Usagi. In the anime she was not popular with her classmates because of her powers and her strange seizures as well as personality changes for being the host of Mistress 9, the evil entity that lived in her after the age of 5. Naoko Takeuchi, the series creator, describes her as delicate, quiet, precocious and expressionless.
In the manga, there was a lab accident which killed Hotaru's mother, Keiko, and critically injured Hotaru. Souichi Tomoe, Hotaru's father, rescued her by making her body cybernetic and making a deal with Master Pharaoh 90. He used Pharaoh 90's power in the hope of reviving her. In exchange, he also lost his humanity and became malevolent. After Sailor Moon prevents Sailor Saturn from destroying the world at the end of Infinity she is reborn as a baby without the cybernetic parts. She also ceases to have seizures after this point.
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Official Site: Toei
Links: Wikipedia WikiMoon- Sailor Saturn The Oracle- BSSM Encyclopedia