Chigusa has brown hair tied with a mint ribbon and olive eyes.
Chigusa remains ignorant of Shana and Yuji's true nature, but becomes a source of good advice for Shana on matters where Alastor can not counsel her. The Crimson Lord himself acknowledges and bows to her wisdom after a phone call between the two of them. Described as a woman who can accept anything, she seems to harbor absolutely no problems with Shana often visiting Yuji under the pretext of "training".
Kantaro has referred to her past, when she seems to have been raised in an orphanage.
As Shana's affection for Yuji grows, she begins to seek out Chigusa more often for advice or help. Generally, this is in the form of asking her to teach Shana how to make a bento, as she is repeatedly jealous at Kazumi's ability to make Yuji a bento for lunch. Chigusa often coaches Shana through the steps, despite her obvious, if not dangerous, lack of progress. Chigusa may have bitten off more than she can chew when she attempted to teach Wilhelmina Carmel, an even more disastrous cook, which resulted in a rather large mess in the kitchen. It has been implied that in recent volumes, she was seen pregnant.
- Chigusa has the same Geneon English voice actress as Harumi Fujita.