Shuu

Shuu (修 Shuu) was the childhood friend of Urano. He has been living around Urano for most of his life until Urano died crushed by books and got reincarnated as Myne. He is around the same age as Urano.

History
Shuu has been living in the house next door to Urano's. They also went into the same daycare, so ever since they were children, both of them were childhood friends. Due to that, Shuu knows her obsession and behaviour with books.

One day, both families went on a trip and stopped at a hotel, as both mothers were tired and wanted to take a nap, Shuu's mother gives him a map and marks the planetarium with a red pen then tells him to explore it. With Urano tagging along with him, only becomes an obstacle in his way, because she's only interested in bookstores. He then came up with the idea to leave her at the library while he goes alone to the planetarium. On his way back from the planetarium, he noticed that the library where Urano was had the lights off and the interior was pitch black, so he thought that she returned to the hotel, which wasn't that case. As Shuu and her mother are in panic, they began searching her at the bookstore with no success to the point they had to call the police. Urano was found left in the same dark library sitting on the windowsill reading books. 10 years later, Shuu goes to explore the same planetarium again leaving Urano in the same library. This time, avoiding his past mistake notes the library closing time.

Trivia

 * Due to Urano's childish behaviour over books, bookstores and libraries, he thinks of Urano as a super monster bookworm.
 * When Shuu's mother is at work, he often eats at Urano's home. He also tends to consider Urano's house as a home, and nobody questioned it.
 * Due to living next door to Urano, they lived as if both of them were raised as siblings. This also promotes the fact of why he considers Urano's home like his home.
 * Shuu being annoyed by Urano's behaviour, wished that "she'd get stuck in another world and suffer without books" if she were to be reincarnated.
 * He also responded to Urano that "life isn't that convenient" when she said she wanted to read books all day long.
 * In the end, his wish kind of became true, as Urano was reincarnated as the poor commoner girl Myne in a world with a low literacy rate.
 * Urano calls him "Shuu-chan" in the Japanese version.