Anju, who was Yuus childhood friend and first love, has been in love with him since the 6th grade. She calls him "Anne" because of her favorite book, "Anne of Green Gables". Despite being very soft spoken, she is open about her feelings for Yuu to Miki, who is initially confused but eventually gives in to Anju's request to see Yuu when Miki is not busy with him.
Anju has a serious heart condition that requires life-threatening surgery. She first met Yuus when he was young and noticed his sadness. In an attempt to cheer him up, she hit him over the head, leading them to quickly develop a friendship. Anjus heart condition is now severe, and she collapses in the Christmas episode before waking up to see Yuu by her side. She tells him to go back to Miki and that she has gotten over him.
Anju leaves for America to have the surgery in episode 42. In episode 59, while Yuus and Bill are in New York, it is noticed that Anju and Bill might make a good couple.