Kumokawa Maria (雲川鞠亜, Kumokawa Maria?) is a character introduced in Shinyaku Toaru Majutsu no Index as Kumokawa Seria's younger sister. She is a maid-in-training at Ryouran Maid School and a friend and classmate of Tsuchimikado Maika in her first introduction.
She is reintroduced during the Natural Selector tournament, where she receives reports that Kihara Kagun, her beloved missing teacher would be there. She later gets caught up in the experiment of Othinus in Baggage City, and the bloodbath.