Orchis begins as the biological princess of the Erste Kingdom, daughter of Queen Viola and an Astral father, making her a Half-Human Hybrid. A tragic accident destroyed her original body, leading to the creation of Orchid—a golem vessel infused with Orchis's consciousness to preserve her life. During this period, her physical body entered stasis while Orchid acted as her surrogate, resulting in Orchis appearing significantly younger than her true age once restored.

Her revival occurs near the conclusion of the first story arc when her spirit manifests and reclaims her original form. This allows her to ascend as the rightful ruler of the Erste Kingdom, though her legitimacy faces early skepticism from citizens and figures like Freesia. Freesia associates Orchis with Queen Viola's death due to their strong family resemblance, her resentment stemming partly from this resemblance and the accident that claimed Viola's life.

Orchis shares a profound bond with Apollo, the Black Knight, who dedicated herself to protecting Orchis after the accident. Their relationship evolves into a Lady and Knight dynamic, with Apollo's devotion persisting even when Orchis becomes queen. Orchis also develops a sister-like connection with Orchid, reflecting a Sibling Yin-Yang contrast: Orchis is outgoing and emotionally expressive, while Orchid remains reserved. This contrast is explored in Orchid's Fate Episodes, where Orchis actively supports Orchid's quest for identity.

In the anime's second season, Orchis and Apollo confront Gran and Lyria, with Orchis displaying reluctance to fight Lyria despite their opposing goals. A flashback reveals Apollo's past personality as more carefree before Orchis's accident hardened her into the Black Knight. The anime also incorporates original content, such as a sequence where Orchis, Lyria, and Io are trapped within the primal beast Celeste. Here, Orchis interacts with Io's memories.

As queen, Orchis adopts an Elegant Gothic Lolita style blended with regal elements like a Pimped-Out Dress and ermine cape. She exhibits strong principles, particularly opposing the mistreatment of subjects or the use of people as tools, a stance intensified by Freesia's actions during the Dawning Sky arc. Her leadership faces challenges, including Loki's hostility and lingering public doubt, but she gradually proves her capability, especially during the third story arc. Her character arc emphasizes making up for lost time, often displaying youthful exuberance alongside her royal duties.