Pearl is a supporting character in the anime adaptation of The Villainess Is Adored by the Prince of the Neighbor Kingdom. She is one of the three Fairy Kings of the Marineforest Kingdom, the neighboring realm from which Prince Aquasteed comes, and she holds the title of Fairy King of the Sea. Her position places her alongside the Fairy King of the Forest and the Fairy King of the Sky at the head of the kingdom's fairy society, giving her authority over the sea and its fairies within that hierarchy.

Her personality is marked by a permanently ill-tempered and unfriendly disposition. She is blunt and cold in manner, rarely softening her words or expression toward those around her. Her most prominent characteristic is a deep-seated hostility toward the protagonist, Tiararose Lapis Clementille. She openly dislikes Tiararose, and a specific grievance with her leaves the sea fairy king perpetually displeased, although the exact cause of this resentment is not revealed in the story.

Pearl's role in the narrative is a minor one, as she appears among the fairy rulers of Marineforest rather than as a central figure. Her chief narrative function is as a fairy authority who views Tiararose with outright enmity, in contrast to the warmer reception the heroine receives from some other fairy beings. Her relationship with Tiararose is defined by this animosity, and her connections to the rest of the cast are shaped by her membership in the trio of Fairy Kings who oversee the fairies of Marineforest. Her personal history beyond her title and temperament is not explored in detail, and the story does not showcase any individual abilities for her apart from the standing her position as Fairy King of the Sea carries.