Rattie
Rattie, originally Khaxazam, is an evil ass freaker demon child and the canonical daughter of the Blood God Khorne who was transformed into the form of a small rat by whoever the fuck is supposed to be the protagonist of Warhammer 40K as punishment for her incalculable kill count, not counting her tortured victims and the earthquakes, volcano eruptions and fire-hurricanes she magically conjured. She is the direct cause of the volcano that destroyed Pompeii and the trivia on Stuart BITCHle's page is a fictitious fucking lie written by one of his Go0Nz! in order to make him seem godly and powerful. He did everything else on the Hall of Shame tho.
She inherited her unquenchable bloodlust from her father, and had an ugly and outright heinous appearance. Her first kill was carried out when she was only of three months, and started her intense craving for blood, which would become her favorite drink ever. After all, her favorite food was a demented form of cereal with eyeballs in the place of cereal and blood in the place of milk. Essentially, growing up in the Khorne household was some Addams Family shit.
She somehow was captured by heroic NPCs and turned into a rat as punishment for her crimes. Khorne, being senseless to the fate of his own daughter as long as it meant that more blood was being shed, did not give a fuck as the NPCs attempted to behead her, and they did.
Her decapitated head rolled across the stone in an expression of lifeless shock, but little did her captors know that they fucked up. Big time, in fact. Her corpse emitted a strange bright glow, a glow that was changing colors every 10 seconds. Her head was slowly slithering back to the rest of her body. Before the NPCs could figure out that the strange phenomenon in front of them was actually emitting radioactive energy in the air, it was too late as their skins were already melting off their body.
As they ran in fear and horror, the ghost of Rattie haunted and tormented them until they collapsed and became nothing but bones for Khorne's throne. After this dastardly deed, Rattie ascended up into the overworld since she was technically dead. Thus, a slightly sanitized but no less malevolent Rattie materialized into existence in Detroit somewhere within Molossia, which coincidentally also happens to be where Crisp Rat resides. Since they are both psychotic rats with malicious and harmful intent, they instantly fell in love, married but never fucked, this would have unforeseen consequences as one day she cucked him for Remy which soon led to an epic divorce scene. While Crisp was wailing like a baby in his mancave listening to gay penis music like the sad virgin he is, Rattie in contrast did not give two shits since she was too busy serving Coca-Cola the old fashioned way and going on insane chaotic bullshit adventures with Remy and was present for the fierce battle between him, Stuart BITCHle.
In short, Rattie has more character prominence and screentime in the Omniverse Saga than in the FUCKING SHOW SHE'S SUPPOSED TO BE ON.