Six forms one half of a cyclops twin pair with Nana, their profound interconnectedness leading others to perceive them as a unified entity. They physically share a single eye and a single wing. Dark purple hair distinguishes Six from Nana’s light purple. Married to the human student Tetsukasa Tsuchikiyose—who serves as wife to both twins—Six engages with Tsuchikiyose through unwavering enthusiastic support and dedication. A notable personality trait is their distinct fascination with glasses, possibly arising from their physical inability to wear them. For sustenance, they adhere strictly to a diet composed exclusively of food additives.