Reu is A female Replis arrives at Kyosuke. She has red eyes and silver hair, and has an innocent, pure, and cheerful personality like a child. She also shows that she is a created being, such as by showing physical abilities that are greater than humans, but even after subtracting those differences, she shows emotions like a real human. Kyosuke treats her like a human girl. She calls Kyosuke "onii-chan" and she begins to admire him.  Her favorite song is "Lease" by Takeshi Abo.