Miu was first introduced to Nobu during Nana Osaki's first hyperventilation attack. She lends Nobu a paper bag to help Nana deal with it. After a few more confrontations with Nobu, they become fast friends, and he is immediately smitten by her. However when he makes a move on her, she reveals her age and indirectly rejects him for being "unreliable." Nobu, who is again dejected, seeks affection from Yuri instead.
Miu had pale skin and long light brown hair and light brown eyes. She always wore wristbands or long sleeves to hide the scars on her wrist.
Miu was a very kind and helpful person who was also characterized as very perceptive.