In the 2012 OVA Code Geass: Nunnally in Wonderland, Nina Einstein appears as a supporting character cast in the role of the Cook. As in the main series, she is a student at Ashford Academy and a member of the student council, known for her quiet, bookish demeanor and exceptional aptitude for science, particularly nuclear physics. In the original continuity, she develops a deep admiration for Princess Euphemia li Britannia after a hostage incident, and later creates the devastating superweapon F.L.E.I.J.A. (Field Limitary Effective Implosion Armament) under the direction of Schneizel el Britannia. In Nunnally in Wonderland, a comedic parody set in an alternate Wonderland, Nina assumes the role of the Cook and is characterized by her eccentric culinary creations, which incorporate F.L.E.I.J.A. into the dishes she serves. When the Duchess (Nunnally) requests something different, the Cook responds with frustration, complaining that the Duchess is never satisfied despite always asking for what she wants. This interaction highlights the Cook’s irritable side and her tendency to take her work personally, a comedic exaggeration of her main-series obsessive fixation. In this OVA, her background as a brilliant but socially awkward scientist is recontextualized into a parody of a short‑tempered chef whose cooking is dangerously experimental. Her motivations in the OVA are simply to fulfill the Duchess’s orders, albeit with her own reckless flair. She has no significant development beyond this one‑off comic role, but her presence reinforces the absurd tone of the Wonderland setting. Her abilities remain tied to her scientific genius, manifested here as the ability to weaponize food with F.L.E.I.J.A. Her relationships are limited to the Duchess and the other Wonderland characters, serving as a source of slapstick conflict. Overall, Nina Einstein as the Cook is a lighthearted alternate take on her original personality, blending her signature brilliance and intensity with the playful, exaggerated world of Nunnally in Wonderland.