The main protagonist of the story, she is 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. She loves to swim, and her hobby is to collect little plush aquatic animal toys, such as dolphins, fish and clams. Her personal name means "midday" and her family name means "white rock ".