Mikoto Urabe is the mysterious female protagonist of the anime and manga series 'Nazo no Kanojo X' (Mysterious Girlfriend X). She is a transfer student known for her odd behavior, including always carrying scissors in her underwear and her habit of drooling, which plays a key role in the story. Urabe develops a unique and intimate relationship with Akira Tsubaki, the male lead, as they navigate the complexities of first love, communication, and the boundaries of privacy.