OVA
Description
Catue Dragundaala is the princess of Dragundalla, daughter of Queen Nina Dragundalla and King Lawrence. She serves as a dragon knight for her kingdom, proficiently wielding her family's ancestral greatsword despite her short stature of 156 cm. Her appearance features gray or lilac hair often styled in braided odango buns, green eyes, a slim build, and pale skin, with measurements of 88-54-83 cm. She typically wears attire reflecting her royal and knightly status, including crowns, armor elements like spaulders and gauntlets, and practical combat wear such as strapless leotards and thigh-high stockings.

The core of her story involves the invasion of Dragundalla by the demon Guignol and his monster army. Returning from a mission, Catue discovers her kingdom ruined, her castle overrun, and her parents captured. She unknowingly kills her own father, King Lawrence, who had been transformed into a feral dragon by Guignol's magic; the revelation of this patricide compounds her trauma. Captured by Guignol, Catue accepts his challenge: endure and complete every order he gives for seven days in exchange for her people's release, the reversal of dragon transformations, and the withdrawal of his forces. She endures physical and psychological torment during this period, including forced servitude in revealing outfits.

Her character arc diverges significantly between media. In the visual novel's golden ending, Catue successfully navigates Guignol's challenges, kills him, rescues her fiancé Jindrack "Jin" Hemy, restores her kingdom, and marries Jin, achieving stability. Conversely, in the anime OVA adaptation and related bonus episodes, she fails the challenge. As punishment, Guignol attempts to transform her into a full dragon using her latent draconic ancestry; due to recessive genetics, this instead turns her into a "cute monster girl" with dragon-like features including horns, wings, a tail, and amber eyes. She is condemned to eternal sexual enslavement alongside her mother Nina, serving Guignol's army and Jin, who has been transformed into a feral dragon. This culminates in Catue becoming pregnant with Jin's child and enduring a painful birth during ongoing assault in the bonus content.

Her relationships are central to her development. With her mother Nina, Catue experiences profound betrayal and trauma after Nina—mind-broken by Guignol—sexually assaults her, resulting in parental incest. Her bond with Jin shifts from mutual respect as fellow dragon knights to a tragic connection; after his transformation into a mindless dragon, he impregnates her during forced encounters, with their child symbolizing their shared degradation. Her friend Anna, a lady-in-waiting, represents Catue's failure to protect those close to her, as Anna endures assault and enslavement.

Catue's physical transformation into a monster girl reflects her loss of autonomy. Despite retaining a humanoid form, the dragon features mark her irreversible subjugation. In one visual novel bad ending, this change leads to a "face heel turn," where she becomes a commander in Guignol's army, pillaging kingdoms while visibly pregnant. The anime's bonus episode reinforces her ultimate fate: perpetual slavery, motherhood under duress, and the extinguishing of her identity as a princess knight.