Yuzu Date

Yuzu Date  (伊達 柚子) is the second wife of Ryuunosuke Date, although she is the self proclaimed "#1 wife". At the end of Vol. 12 Ch. 117, she eventually becomes pregnant with Ryuu. In Vol. 15 Ch. 147, Yuzu eventually gives birth and becomes the mother to a boy named Rinnosuke Date.

Trivia

 * Her name Yuzu (柚子) means "grapefruit, pomelo, citrus fruit".
 * It is revealed that Yuzu used to date a guy named Joe.
 * Yuzu is the only wife who have a long hair that reaches her waist.
 * Yuzu's surname before marrying Ryuunosuke Date is "Ootsu".