Aiko Asou

Gender: Female   

Aiko is Ichitaka's next-door neighbor after he moves out of his parents house. She has an uncanny resemblance to Iori Yoshizuki.

Although her name does not begin with an "I", the "Ai" from "Aiko" represents an "I" sound in Japanese, indirectly marking her as an "I."

At a later point, she and Ichitaka start developing feelings with one another, resulting in Aiko moving away. She does this to protect Ichitaka and Iori's love intact.