Kokoro Mitsume

Kokoro had a dream of studying primitive emotion, and she was eager to find out what these emotions were, finding it, in her own words, fascinating and quite interesting.

She is one of the 4 smartest students. Kokoro was one of the 15 students who introduced herself to Sora and Yuki Maeda. After a while, all the students went to the Monocruise at face value. At this time, after Setsuka made a suggestion to go swimming, all the students (except Sora, Yuki, Kokoro, Emma, ​​Mikado, and Yoruko) agreed, borrowing swimsuits from the supermarket to swim. After Yuki said he would give up and began to enter the water, everyone including Kokoro passed out. After a while, the students would wake up to find that they were dressed in their talent costumes and their swimsuits had been removed. Soon, an anonymous announcement would be heard, calling for everyone to gather at the central park.

In response, Kokoro, along with the other 14 participants, headed to the central park. Upon arrival, Monocrow would appear. It was announced that he was the one who kidnapped everyone present, and the only way to leave was to kill someone, thus announcing the Killing School Trip. Yuri Kagarin's body would soon be discovered. Afterwards, Kokoro would ask the participants, "What do you think about this murder?" Even though most of them were confused by the question, it would help her uncover the killer because she could read the emotions in their answers. She claimed to know the killer at the beginning of the class trial, but didn't say it until they confessed. Her intelligent theories and guesses saved the students from blaming Yoruko and led Sora to the right path, choosing Hajime as the culprit.