Yumi Omura
Yumi Omura (大村裕美, Ōmura Yumi?) is a seventeen year old girl who works at the Japanese pub [My Pleasure] alongside Hideki. In the anime, she is the daughter of the club's owner, but in the manga, she is only an employee. It is initially implied that Yumi is interested in a relationship with Hideki, but as the series progresses it is revealed that she initially approached him because he also worked at Club Pleasure, and that she thinks of him as an older brother. Throughout most of the series Yumi has an inferiority complex toward persocoms, and becomes upset at any mention of a human-sized persocom.
The reason for this is that while Yumi was working at Chiroru she fell in love with the manager, Hiroyasu Ueda. She gathered the courage to tell him, and found out that he reciprocated her feelings. However, Yumi later discovered that Ueda had previously been married to a persocom that he had named Yumi, (See Hiroyasu's entry) and she thought that he would compare her to the persocom Yumi and find her inferior.
However, Hideki eventually manages to persuade Yumi that Hiroyasu wouldn't have started anything if he didn't love Yumi for who she was, and he and Yumi resume their relationship.