Etia Visconti leads the Sefiro Fiore Nagataki Branch, an organization fighting Daemonia entities through Elemental Tarot cards. Wielding "The World" tarot card, she holds significant authority within the group's hierarchy. Her duties involve overseeing branch operations and mentoring younger members like Akari Taiyo. By day, she serves as a literature teacher at the branch's educational facility, disguised as a fortune-telling school. She maintains a kind and polite demeanor, contrasting with stricter colleagues such as Ariel Valtiel Westcott. Etia consistently prioritizes her students' safety over directives from parent organization Leguzario, demonstrating compassionate leadership.

Her appearance features light blue hair in long twintails extending near her knees and matching light blue eyes. In her transformed state, she wears formal attire resembling a maid costume, including a ribbon or hat-like head accessory. During critical situations, she explicitly values Akari Taiyo's life above organizational mandates, reinforcing her protective commitment. Etia receives counsel from Laplace, a talking crow affiliated with Sefiro Fiore.