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Kokoro resembles Satori Komeiji in some ways, and both are closely related to Koishi Komeiji in story and abilities.A silhouette of Kokoro occupies the front of Hopeless Masquerade's jewel case.Touhou 13.5 - The Lost Emotion Remix 2 Trivia Through the story of Hopeless Masquerade, she strengthened her own emotional capacity and became more lively toward her surroundings. All of her masks are in harmony with one another when she lost the Mask of Hope, it caused a severe imbalance and she would go berserk. Kokoro, a rather lifeless and emotionally devoid person, had to rely on her masks to properly communicate her emotions. However, she mainly uses the masks holding the emotions joy, anger, pathos and humour. She carries a total of 66 masks with her, which all holds a different emotion and face. Her skirt is in a pumpkin shape, depicting several faces on it. She wears a blue blouse with plaid pattern. Kokoro has long, pink hair and pink, empty eyes. Byakuren and Miko both claim that their solutions solved the problem, and Kokoro is invited to the Hakurei Shrine to perform Noh plays as an offering to the gods. In the process of doing so she discovers her own anger at the religious leaders who are taking advantage of the situation, and Reimu, Byakuren, and Miko team up to stop her. Most of the characters who try to stop her come up with their own solutions to her hopelessness, including Byakuren teaching her Buddhism to control her own emotions and Miko making her a replacement mask of hope, but none of them completely work until Mamizou notices the contradictory actions Kokoro is taking and offers her own advice, which is to stop relying on the masks and discover her own, true emotions through meeting (and fighting) a variety of people. Reimu and the others participated in this contest and are eventually guided by Mamizou to the Human Village at night, where Kokoro searched in vain for her lost mask.
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She controlled the humans through the masks placed on them into looking for her mask of hope. This caused her power to control emotions to go berserk, causing the humans in the Human Village to lose hope as well and become enthralled in a religious popularity contest that came to be known as the "dueling fad". In this game, Kokoro lost her mask of hope, which was stolen by Koishi Komeiji. After the plays, the war ended and there came peace. When Prince Shoutoku was in war against Soga no Moriya, Prince Shoutoku ordered that Kawakatsu perform 66 types of play for ancient ritual with 66 masks given by Prince Shoutoku. She became a youkai after a long time from these masks which were used by Hata no Kawakatsu. Hata no Kokoro is a youkai of menreiki, and she holds a total of 66 masks.
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