The dean of Sumiyuri Private Academy and previous friend of Jun Aikawa: Noa Origami. As a member of the Origami family, she is part of the "economical" world, which is one of the four most influential families. Jun speaks badly of her when talking about her to Ii and Ichihime Yukariki, though they seemed to have once been friends. Jun describes her as having a terrible personality, and badmouths her in general. Noa was determined to achieve her goals, which led to questionable things she did at the academy.

Spoiler

Noa is found dismembered into 12 pieces, with her head being strung to the director's room's ceiling fan. When Jun sees this, she has this sense of dread on her face, though she doesn't mope about it.

Spoiler

When Shiogi learns that the dean is dead, she panics as Noa is actually her mother.