Ageha has a personality much like her older brothers when they were children. She is very frank and is said to be just like the other Hitachiin women in her family. It is also possible that she has above normal intelligence, as she is shown reading a large book titled "The Meaning of the Universe," despite her young age.
Ageha looks like a normal little girl, with short dark hair that is slighty curled inwards on the ends and a small stature typical of her age. She wears a solid colored dress in her appearances in the manga.
Although little is seen of Ageha, it seems that the twins dote on her, giving her dresses and toys; however, these fail to impress her and she bluntly rejects them.
Both mother and grandmother seem to get along well with Ageha, as she has similarly opinionated attitudes as they do. They praise her for not trying to flatter men, especially her brothers, Hikaru and Kaoru. She says that Kazuha's hair is weird, but Kazuha doesn't seem to notice or care.
- Hikaru: Ageha☆ Big brother Hikaru made this game for you~♡
- Kaoru: Look Ageha☆ Big brother Kaoru made this dress for you. It's cute~♡
- Ageha: Both of them look stupid.