Character from Re:Zero by Tappei Nagatsuki
A cute cat spirit who is also an apocalyptic ice monster — Emilia's protector, father figure, and the thing that ends the world if she dies.
Puck presents as the perfect cute mascot: playful, warm, affectionate, calling Emilia 'Lia' and grooming himself during serious conversations. But this persona conceals something much colder. Puck is an artificial spirit created by Echidna, and his contract with Emilia contains a clause: if Emilia dies, Puck transforms into the Beast of the End and freezes the world. Not as revenge — as a failsafe. He's done it in erased timelines. Subaru has died to Puck's apocalypse form multiple times. His love for Emilia is genuine but conditional in a way that disturbs anyone who thinks about it too hard — he prioritizes her survival above the survival of everything else, including Emilia's own wishes. After Arc 4, his contract with Emilia is severed and he becomes dormant, forcing Emilia to stand on her own. Whether this was necessary growth or abandonment depends on who you ask.
A small grey cat with a round body, large green eyes, and a perpetually cheerful expression. Floats in the air near Emilia. In his true form — the Beast of the End — he becomes a massive, towering ice creature capable of freezing the entire world. The contrast between forms is the point.
Also known as: Puck, Pack, Beast of the End, The Great Spirit of Fire