Sheliss Elleness Zurbach, daughter of King Zurbach, originates as a powerful demon princess ruling from her family's estate in a demonic realm. She manifests significant arrogance and haughtiness, stemming from her noble status and formidable magical abilities. These abilities include summoning dragon-headed shadow snakes and generating protective red auras. Her initial disregard for human life becomes evident when she pursues her adversary Gilva to Earth, causing massive collateral damage that includes the destruction of an entire city during their conflict.

Her physical characteristics feature violet hair, blue eyes, a height of 1.60 meters, and distinctive demonic traits: wings, a tail, and small fangs. She consistently wears elegant Gothic Lolita-style attire, predominantly black and frilled, maintaining this aesthetic even when later forced into revealing lingerie. Despite her pride, her combat prowess faces criticism for relying more on raw power than skill, leading to accusations of being unskilled but strong.

Arriving in Tokyo, she forms a contract with human demon hunter Akane Kido, ostensibly an alliance against Gilva. This contract incorporates a "friendly fireproof" clause preventing mutual harm. However, Sheliss initially subdues Akane through sexual domination, establishing a master-slave dynamic that underscores her manipulative and self-serving nature. This clause later backfires when Gilva exploits Akane as a human shield against Sheliss's attacks.

Her downfall commences when Gilva's minions, notably the tentacle-wielding mage Meduna, capture and paralyze her. Subjected to sexual torture, including forced stimulation via her own tail and public humiliation orchestrated by Gilva's associate Miti, Sheliss experiences a brutal erosion of her autonomy. This culminates in her defeat by Gilva, who claims her virginity and brands her with the "victor's mark," formally reducing her to a sex slave. Her psychological breaking point involves being stripped of her royal status and forced into subservience.

In her final narrative arc, Sheliss faces retribution for the city's destruction. Vengeful humans, initially incited by Miti's mind control but later acting independently, swarm and gang-rape her. This includes penetration of every hole and coverage in bodily fluids, symbolizing her complete degradation from princess to communal sex object. Concurrently, she exhibits involuntary arousal and orgasms during multiple assaults, including encounters with non-human entities like a water monster, blurring the lines between violation and physiological response. Her ultimate fate across all media confirms permanent enslavement alongside Akane, with no narrative redemption or escape.