Oharu is a sweet, shy, kind and hospitable person, but behind her cheerful demeanor is a fatalistic attitude that feels that fighting against the insects is a futile struggle for humanity, a viewpoint fostered from the tragic death of her parents by the insects. This belief evaporates when she witnesses Jinbei's strength and bravery when he attempts to rescue her from a giant spider. After Jinbei saves her life from the spiders, she falls in love with him.
Oharu, being an ordinary human, possesses no superhuman abilities. She does however have a remarkable allure to all men of seemingly any age. She is also a highly capable cook, as her family's restaurant is very popular in Edo.
Oharu has shown a lot of respect and care for Jinbei, even calling him "sama" in his name. Ever since Jinbei saved her from the Roof Prison Spider, she held strong affection and feelings for him. When Genjuurou, Jinbei's father, offered to let Oharu marry Jinbei, Oharu became extremely flustered. While Jinbei is oblivious to Oharu's obvious crush, he has nonetheless become especially protective of her.
- Oharu three measurements are B94, W58, H88.
- Oharu's appearances regularly provide the main source of fanservice for the series. Also, a recurring theme for her is becoming quite clumsy around Jinbei, often falling onto him and pressing her breasts into his face as a result.