Yumi is a very sweet girl with huge breasts and is very jealous of Persocoms. She fell in love with Mr. Ueda
only to find out that he was married to a Persocom with the same name as her.
She quit her job at the Bakery and started working at Club Pleasure. She met Hideki there and they became good friend. She was very happy with Hideki, and Hideki later helps Yumi and Mr. Ueda get back together.