A first-year student at Sankai High School. Born on November 7th. 173cm tall. Blood type AB. Has a younger sister named Minako. His favorite food is chestnut zenzai (sweet red bean soup). His least favorite food is chicken. His hobbies are playing with birds and birdwatching. His motto is "mountain beauty and clear water."

He is a quiet, cool, and solitary loner with long black hair, and a master of ninjutsu. His special skill is distinguishing between the sexes of chicks. While he often acts independently and mysteriously, his actions often help him uncover problems and support his friends. He is agile and sometimes climbs trees to play with birds, and sometimes uses this skill to support his friends. He loves animals and is well-liked, even wild beasts become tame in his presence. He is loved by fellow first-year En, who takes an interest in him, and respected by Rai.

Not much is known about his private life, other than that he lives in the forest behind the school and works part-time jobs day and night to support his hospitalized sister. As a result, his attendance rate is extremely low, and his financial situation is even worse than En's; he was even on the verge of fainting from hunger when En went to him to ask for a loan. As a result, he often receives vegetables grown in the principal's own garden.