A 25-year old adult at the beginning of the story. She has a physique of someone in her elementary which causes her insecurities to her friends in the University. She is a very jealous person but always reminds herself to be more mature.
She offers her place to Tsutomu after Tsutommu's apartment was burn down. She is in fact a widow. She married into the Shizumu household when she was in high school. Ageha also states that she only experienced one year of high school. Ageha resmebles her sister a lot. Ageha's sister was the first wife of Shizumu. At volume six, she is pregnant to Tutuomu's child and they got married after Tsutomu returns to her.