A female Daimon who appeared in episode 95. She was the product of the fusion of a Daimon Egg with a light-up, heart-shaped monument at Lover's Park. In accordance with Kaolinite's orders, she was to extract the Heart Crystal of one of the winners of the upcoming "Affection Contest", as the winner would possess the pure heart of a sweet lover and thus make an ideal target. Suddenly coming to life just as Gurio Umino, the contest's winner, was about to turn on the light inside of the very monument from which she had been created, Dai Heart extracted his Heart Crystal after he pushed Naru Osaka, his girlfriend, out of harm's way in a display of his pure hearted thoughtfulness towards her. The Inner Senshi appeared and attempted to prevent Kaolinite from claiming Umino's pure heart. The villian then instructed the daimon to incapacitate the senshi, which was accomplished when Dai Heart created a wave of hearts that made any of her opponents within range susceptible to illusions she created. One of these, called "Let's Dancing" created green hearts released from her hand which took on the form of handsome young men. The men invited the adversaries to dance, then suddenly transoformed into creatures which incapacitated victims with tentacle-like projections and subsequently electrocuted them. During this tiem, Dai Heart dealt with Naru, byt when met with Sailor Uranus, the senshi hit her with World Shaking, disrupting her concentration long enough so that the captives were freed. Dai Heart ended up being destroyed by Sailor Moon's Moon Spiral Heart Attack. She had yellow eyes, pink hair, and light green skin.