Eiko Izumi

 is one of Naeka Fujiwara's classmates and member of the Female Kendo Club. She and Miwa are usually seen together and hang out with Naeka, eating lunch together or at practice. Eiko is usually the first to yell at her busty classmate for her shallow or selfish comments while highly envious of Naeka's bust size and commonly assaults her friend by groping her breasts. Her desire for bigger breasts is such that she willingly becomes Urashima Taro's mind-controlled slave in exchange for him using his powers to enlarge her bust size. Despite her envy for the figure complex, Eiko does enjoy her friendship with Naeka, scheming for their kendo club, wanting in on the latest gossip, or needing help with the maid cafe where she and Miwa works.