The main protagonist of the story, a seemingly-ordinary high school junior with the ability to bring out the hidden abilities of the "Lunar Race". She has been "gifted" with the ability to distribute good luck to the people around her. Mahiru is good-natured, always seeing the best in people, and strong-willed. "Descendant of the Princess" and aide to the Moonlight bandits.
Mahiru was orphaned at a very young age, and was brought up by her aunt. According to her aunt, Mahiru never asked for a single thing in her younger ages, and is always constantly worrying about what other people think of her. She loves to swim, and her hobby is to collect little aqua plush toys ( animals and plushies from the ocean, such as dolphins, fish, etc.) She is 17 years old, born on June 29th. Her first name means "midday" and her last name means "pure white".