Hiyori Kusakabe (日下部 ひより, Kusakabe Hiyori) is a girl who works at Bistro La Salle. She is a Native worm born from two Natives who had mimicked the parents of Soji Kusakabe, essentially making him her brother. She transforms into her Native Worm form Sisyra Worm (シシラワーム, Shishirawāmu).