Princess Aurora Sya Lis Goodereste, called Syalis, serves as the central figure of her story. A scion of the Unified Human Nation of Goodereste’s royal family, she was taken hostage by the Demon King to coerce human surrender and provoke her betrothed, the hero Dawner, into battle. Unmoved by political strife, Syalis fixates on enhancing her sleep through unorthodox, often destructive means, treating her captivity as a problem-solving challenge.

Her personality blends a single-minded obsession with comfort and a disregard for danger or convention. She courts mortal peril to gather materials such as spectral grave cloths or plush demon pelts, yet her transactional view of demons softens as she inadvertently cultivates alliances, transitioning from viewing demons as tools to recognizing their autonomy. While her actions remain driven by self-interest, she intermittently assists demons with personal struggles, hinting at latent compassion beneath her detached exterior.

Syalis possesses a slight frame, wisteria-hued hair divided into four ribbon-bound sections, and luminous star-patterned purple eyes marking her royal heritage. Her wardrobe features a frilled pink robe, bear-motif stockings, and fluff-ball-adorned shoes concealing explosives provided by Dawner. She rapidly shifts outfits, favoring functional sleepwear like demon-fur pajamas.

Notable connections include her dispassionate engagement to Dawner—dubbed “Daw-What’s-His-Name”—and her complex rapport with Demon King Twilight, whose governance subtly fuels her ambitions to rule effectively. The Demon Cleric Leonard nurses quiet devotion toward her, though she values him chiefly for posthumous revival services. She collaborates with castle denizens like Neo Alraune and Great Red Siberian, earning their wary respect through shared mischief.

Syalis evolves from obliviousness to introspection. Initial chapters portray her ignoring collateral damage, but later arcs expose dawning accountability, such as remorse over her father’s overwork and deliberate support for demon comrades. Time-travel episodes showcase her inadvertently shaping demon history, including pivotal encounters with Twilight’s forebears, which broaden her cultural understanding.

Distinctive quirks include insecurity over her truncated tongue, phobias of needles and horror films, and an inability to articulate “unisex.” She demonstrates niche talents like hypnotism and repurposing enchanted objects into sleep aids, while her chaotic influence unintentionally undermines both Dawner’s rescues and Twilight’s schemes, destabilizing conventional conflict narratives.