仮面ライダーアギト
is a young psychic woman who committed suicide at the age of 23 after discovering she was becoming the very first Agito. She was involved in paranormal research, conducted by Professor Kazaya at Jyohoku University; this resulted in severe trauma and led her to unconsciously kill Kazaya. She left behind a younger brother, Tetsuya Sawaki, who would later become Kamen Rider Agito.