Koishi Komeiji is a character from the Touhou Project series, created by ZUN. She is the younger sister of Satori Komeiji and resides in the Palace of the Earth Spirits. As a satori, she possesses the ability to read minds, but she closed her Third Eye, rendering her unreadable and giving her subconscious powers. This decision has made her invisible to those around her, as people subconsciously ignore her presence. Koishi is portrayed as whimsical and carefree, often acting based on her subconscious desires. Her character explores themes of loneliness and self-acceptance.