Konomi is in her last year of middle school and is the step sister of
Shuuji. She practices judo as Shuuji did before with
Amane as a mentor. Unlike
Nadeshiko, Konomi gets along well with Shuuji, she loves her new family and she worries a lot about him, who does not give her any news since he left. Her real father has also deceased, but Konomi is straightforward and does her best in this hard situation. She's doing her best to do something about the cold relationship between her mother and her step brother. She's admirably well-behaved and calm, but she her personality has a strong base and she acts whenever needed.
Aside from her family, Konomi loves Amane and
Aoi a lot and she would like to one day be able to cook as well as they do.
She is a very innocent and naive girl. Pretty shy, she doesn't dare to impose too much to say what she thinks. To help her get some insurance, Amane trains her to Judo herself and that helps her to at least have the courage to speak to other peoples.
Two or three years ago, she used to go to Shuuji's room to read manga or light novels on his bed. Also nowadays, Konomi doesn't have a particular hobby except staying in her room to read manga, which suggests she must be very alone.
(spoiler hidden)