Kuon Niwa (丹羽 玖遠 Niwa Kuon?) is a character introduced in Corpse Party: Blood Drive.

Kuon is an assistant English homeroom teacher of Kisaragi Academy Senior High School's classroom 2-9, the CEO of Perfect Life Promotions Co.,Inc. and a victim of Heavenly Host Elementary School.

She is the older sister of Aiko Niwa.

Kuon gives off the air of a sunny, doting personality, similar to Yui Shishido as the five original Heavenly Host survivors have acknowledged on more than one occasion. As a teacher's assistant, she pushes her students to try their hardest and only wants for them to succeed, making her popular among the students. This is demonstrated by her giving Satoshi Mochida tutoring, despite it being in a subject that she doesn't teach, and hounding Yoshiki Kishinuma to make sure he completes his make-up work.

Despite coming from a place of love, Kuon can be very controlling. Her overly-developed brain has given her the ability to see the most effective action to completing a task, leading her not letting others take the leadership role. But because of her exceedingly high intelligence, Kuon is very logic-oriented and often fails to factor in how her actions might impact those around her. She doesn't understand the emotion behind the reactions she receives, such as Aiko's anger towards her controlling nature, or Satoshi's unease towards her love confession.