Haikyun is a Daimon Heart Snatcher who was created by Kaorinite to extract a Pure Heart. She was created from a volleyball, and can use an energy volleyball as her attack. She can also trap people in a volleyball net. She appeared in Sailor Moon S Episode 11, Individual Happiness.
Kaorinite sent Haikyun after an athlete named Jamie. She extracted his Pure Heart, and used it as a volleyball, but Sailor Venus took it back using her volleyball skills, and Sailor Moon destroyed Haikyun with Moon Spiral Heart Attack.