Ellie, a 17-year-old Drifter from Rocktown, pilots the Cradle Coffin LEAHLID with her Magus partner, Ange. She possesses pink hair styled in twintails and red eyes. Her clothing shifts from an initial preference for light colors to darker attire by the series' end. Ellie embodies a tsundere personality, masking deeper emotions with initial aloofness. Her significant history as Kanata's childhood friend includes longstanding romantic feelings. Throughout the narrative, she struggles to confess these feelings effectively. Her confidence grows over time, notably in handling her relationship with Kanata; when Ange teases her about Kanata and Noir, Ellie responds with composure. A pivotal moment occurs when Ange creates an opportunity for Ellie to express her feelings before Kanata undertakes a perilous mission. Ellie entrusts Kanata with her cherished doll, symbolizing her emotional investment in his safe return. Beyond the main series, Ellie appears in supplementary media: the manga "Synduality: Ellie" and its light novel adaptation. Merchandise includes a non-scale model kit featuring interchangeable jackets, aprons, facial expressions, and hand parts, as well as a prize figure depicting her in a bikini. In the concluding events, Ellie remains in Rocktown, observing Maria's rocket tests alongside Ange. Her journey reflects a progression from tsundere tendencies towards expressing concern and affection through meaningful actions.