Ushiromiya Eba♀

Kinzou's second child and eldest daughter. Eva is hostile towards her older brother Krauss out of discontent for her family's patriarchal tradition, which places her in a position inferior to her brother in the family hierarchy, and constantly attempts to upstage him by all means. She rallies her younger siblings against Krauss to try and extort money out of him, though with limited success. She is skilled in various forms of martial arts, and is said to be excellent at cooking.

Despite her insidious personality, however, she treasures her husband and son dearly.

[Edited from Wikipedia]