Miyabi

Characterized for her long, dark straight hair and refreshing smile combined with her modest personality, Miyabi actually has a bit of a past as a delinquent she's trying to leave behind. Because of that, her articulate, feminine speech crumbles away when she gets drunk, instead going for a more rough, masculine speech.

Spoiler

Her real name is Hanayagi Misako (花柳 雅子).