Madoka Date

Madoka Date  (伊達 まどか) is the first wife of Ryuunosuke Date, although she acts more like the 2nd wife. In Chapter 89, she divorces Ryuu and leaves the "Date" family, which now makes Koharu Maezono the second wife of the "Date" family.

Trivia

 * The name Madoka means "circle".
 * In Volume. 16 Chapter. 150 (pg. 6), it is revealed that Madoka's maiden name is Saijou.
 * It is hinted that Madoka has a sweet tooth. Hinted by Koharu bribing Madoka with sweets to let her in to her room.