Kurezome Yuzuki

"A high school boy who has found himself in The Cage. Despite being transported to a strange new world, he remains calm and collected, with only the occasional sigh to betray his unease. He's currently searching for a way to return to Tokyo and his beloved mother."

Trivia

 * The name "Yuzuki" is usually given to girls in Japanese.
 * The second kanji of Yuzuki's first name "月" means "Moon" or "Month", which explains the title "Broken Moon; Flowers Worth Saving" and his Moon Route in "The Sun and the Moon" story arc.
 * His last name contains the kanji "暮" for "sunset" or "dusk".
 * His birthday, December 22nd, is the winter solstice.