Puck, an artificial spirit crafted by the Witch of Greed Echidna four centuries before the main timeline, shares a sibling dynamic with Beatrice, another of Echidna’s creations. Unlike Beatrice, he never developed maternal ties to Echidna and severed their contract. He later forged a pact with Emilia, a silver-haired half-elf, viewing her as both a daughter and his sole purpose for existence. The contract mandates that Puck will strive to annihilate the world should Emilia perish, underscoring his unwavering commitment to her survival. In his diminutive form, he appears as a nine-centimeter-tall feline humanoid with light grey-and-white fur, a lengthy tail, and a golden hoop earring on his left ear. His personality shifts between mischievous playfulness and intense ferocity, particularly when Emilia faces danger. Despite Beatrice’s typically irritable disposition, she retains fondness for him, reflecting their enduring bond. During interdimensional ventures, Puck engages in conflicts across alternate realities. After a wormhole incident separates him from Emilia, he allies with a group combating rogue golems in another dimension, strategizing with allies to overcome threats and reunite with lost companions. These actions align with his core traits: loyalty to Emilia, tactical collaboration, and a blend of whimsy and aggression when provoked. Spin-offs and crossovers preserve his established backstory and motivations, focusing on interactions that mirror his original personality. His roles emphasize consistent behavior rather than new arcs, maintaining narrative continuity across appearances.