Zeta, originally known as Lilim, is a golden leopard beastkin from the Golden Leopard Clan, guardians of their ancestors' true history. Her clan was annihilated by the Cult of Diablos to erase knowledge of demonic possession, though her infected state was concealed by her family. After cult imprisonment, Cid Kagenou rescued her as Shadow, curing her possession. She then joined Shadow Garden as the seventh founding member and sixth seat of the Seven Shadows, adopting the name Zeta. Interpreting her father’s directive to find a cure as a mandate, she believes Shadow Garden fulfills that mission in the Midgar Kingdom. Physically, Zeta embodies feline traits with blonde hair, large cat ears, striking purple eyes, and an elegant long tail. Her standard Shadow Garden attire features a black slime bodysuit with high magical conductivity, designed asymmetrically: a left-shoulder cape, jacket open below the sternum, and leggings with gold rings or belts. Media adaptations vary—light novels add frilled pant cuffs, while anime and games depict heeled boots with gold lining. For missions, she adapts to environments like khaki explorer gear in jungles, heavy coats in tundra, or sailor uniforms at sea. Contrary to beastkin stereotypes of brute force, Zeta demonstrates sharp intelligence and strategy. As head of espionage and exploration, she operates solo unless collaboration is essential. Her self-sacrificing nature drives her to absorb blame for those she reveres, even accepting disposal for Shadow’s objectives. Disagreeing with Alpha’s leadership, she covertly formed a faction to transform Shadow into an immortal deity, prioritizing the cult’s annihilation at any cost. Her abilities focus on stealth and adaptability. Excelling in prolonged solo missions, she rapidly masters new skills through a "Heavenly Gift," yet discards techniques before true mastery, limiting her swordsmanship. A signature magic transforms her into mist for evasion, infiltration, or internal attacks via bodily expansion, while manipulating mist into floating blades. In combat, she wields slime-forged weapons like ring blades, hoops, or moon blades (in Master of Garden), leveraging agility for close-quarters efficiency. Relationships fuel central tensions. She addresses Cid Kagenou as "Master" with fierce loyalty yet secretly plots his apotheosis, diverging from Shadow Garden’s goals by planning Diablos’ preemptive revival. Antagonism defines her bond with Delta, clashing through feline-canine rivalry and opposing temperaments—Zeta’s precision versus Delta’s impulsiveness—often erupting in fights. Though respecting Shadow, her hidden faction creates friction with Alpha and the Seven Shadows. Her narrative centers on global espionage, with escalating prominence in later seasons and spin-offs. Master of Garden explores darker paths, like her demonic corruption during the "Requiem for the Falling Shadows" event, confronting allies such as Eta and Olivier. Across media, her quest—fueled by clan tragedy and devotion to Shadow—positions her as a wildcard whose actions threaten to unravel the war against the Cult of Diablos.