?

Her name is secret.
An older woman who lived in the next apartment in Akisuke's building. Although she doesn't talk much when she does she is very knowledable. She is a heavy smoker. She loved children and was a substitute for his mother when Akisuke was young. Akisuke's first love crush.
She lives alone and hangs out every day. She doesn't work, but doesn't seem to be in trouble in her life.

Spoiler

Her real name is 川芽 あざみ (Kawame Azami)