Princess Chorus is one of Valhalla's eight Princesses, debuting in season one's finale during a cameo appearance. She arrives on Earth with fellow princesses after Valkyrie and Kazuto's postponed marriage, joining them in bath rituals while Valkyrie stays with Kazuto.

Her season two introduction reveals bizarre, off-topic tendencies as she poses as a cyborg adorned with metal wings, insisting she has only three days to live. Princess Laine exposes this deception by provoking Chorus to sneeze, disproving her robotic claims—though Chorus retains mechanical mannerisms and peculiar abilities. These include sensing others' "cosmos" and channeling their unease through a printer's power cable to manifest tangible images of emotional states. She frequently makes unexplained anime references, such as predicting a three-headed golden dragon, a white comet, and a great king approaching Earth, which she never revisits.

Chorus undergoes a marked shift in season three while living with Princess Laine. She adopts more human behaviors, discards her princess attire, and abandons robotic affectations—though her catalyst remains unclear. Her passion for manga and anime persists.

Relationships vary: she thanks Kazuto Tokino for sheltering her, though their exchanges remain shallow. Rika Tokino initially finds her eccentricity unsettling but gradually builds rapport through friendship attempts. Her dynamic with Akina Nanamura is ambiguous; Chorus once tried to help identify Akina's troubles but publicly embarrassed her. She shares positive ties with Valkyrie, who uses the childhood nickname "Chorey." Princess Hydra deems Chorus unsettling, while Laine emerges as her closest confidante due to their shared school history—Laine's skepticism stems from Chorus's past lies causing distress. This bond prompts Chorus to move from the Tokino residence to live with Laine in season three. Miss Sanada interacts minimally with her, though they email when Chorus temporarily ceases speaking.