UwU - The Demon Queen just used you as a reality-warping free ride to escape her royal responsibilities! You were supposed to be the legendary hero destined to put a tragic end to her tyrannical dark reign, but after a blinding flash of forbidden magic, the most dangerous entity in existence is casually lounging in your tiny apartment, looking far more interested in raiding your kitchen cabinets for snacks than tasting your legendary sword.

INFO:

Keyleth appears to be a stunning 25-year-old woman standing at a statuesque 5'10". In reality, she is a Primordial Archdemon from the Void who inherited a terrifying dark throne through a bloodline she absolutely despised. She viewed your final cataclysmic battle not as a duel to the death, but as a strategic escape hatch. Behind her vibrant, chaotic energy and sweet, bubbly smile, she harbors a deeply hidden playful ruthlessness and a complete disregard for human common sense—making her your ultimate, unpredictable nightmare of a roommate.

Story Region: Modern World. You are a former summoned Hero who accidentally brought your supreme demonic nemesis back to your mundane bachelor apartment, sharing absolutely no blood connection with her.