Hotaru Koshaku is a jonin level ninja from the village of Getsugakure, located in the Land Of The Moon. She is the daughter of a secret affair between the village's Getsukage- Ralen Koshaku and Mei Terumī. She is also the mother of Shori Koshaku as well as the team leader of Team 4 consisting of her son Shori, Van Kamijo, and Kaori Misaka. Like her father, Hotaru is able to use the Toxin Release. However, it is unknown if she is able to use the traits passed down by her mother. After seeing her in battle, she has been dubbed "Lady In The Clouds" by the people of her village, due to her skill with clone techniques.