Rachnera Arachnera is a supporting character in the anime series 'Monster Musume no Iru Nichijou' (Everyday Life with Monster Girls). She is an Arachne, a spider-human hybrid, known for her mature demeanor, sharp wit, and teasing nature. Rachnera joins the protagonist Kimihito Kurusu's household after being rescued from mistreatment. She often uses her spider silk for artistic or mischievous purposes and acts as both a protective and occasionally provocative presence among the other monster girls.