Hanabusa Seki

Thobari's 40-year-old live-in lover, who works as a paleontologist, often away on work-related business. She knows that Thobari is a ninja, however, she does not understand any of the details about the world of Nabari because he has not told her. She is one to take action and butt into other people's affairs when they are too shy or afraid to make any headway on their own. She will randomly say whatever comes to her mind without any kind of prior explanation. She cooks well and hand-made the muffler that Yoite wears almost constantly in the later episodes.

She likes reading, trekking, meals, and anything interesting. She dislikes people who use others to shine. Her specialty is cup-and-ball games and repairing things.