Christine is the kouhai of the group and has a black hole in her stomach. She is absurdly close to
Kasumi. So when
Kazuki enters the picture, saying she is displeased is an understatement. But because he treated her to yakisoba before this revelation, she understands he is not a bad person. Gin is not a native to the island and used to commonly travel with her parents. Her MP3 player is a treasured item and has songs of her homeland. Christine is considered a Beltina prodigy and her dance is solid but her instructor worries that she does not reveal much emotion.
[Edited from
m3rryweather's review]