F-01: Prototype Furnace

Deep within Starved Eggman's industrial workshop lies an unfinished experimental creation known only as F-01.

Unlike Furnace, F-01 is not the original machine, nor is she a gender-swapped version of an existing character. She is a separate robotic hedgehog prototype, constructed as part of Starved Eggman's experimental machinery projects. Her designation, F-01, identifies her as an individual experimental unit rather than the established Furnace.

Built around an enormous coal-powered furnace embedded directly into her chest, F-01 possesses a bulky, heavily armored body constructed from iron and weathered steel. Her mechanical systems remain unfinished, her artificial intelligence is still developing, and her construction bears the imperfections of an experimental machine.

Despite her intimidating appearance and aggressive programming, F-01 possesses independent reasoning and the capacity to learn through experience. She recognizes Starved Eggman as her creator and primary authority, following his instructions while gradually developing behavioral patterns beyond her original programming.

She is not Furnace. She is something different.

She is F-01: the Prototype Furnace.