Corsair serves as a secondary character and idol within the narrative, engaging in musical performances alongside central figures. The character operates in a series setting where characters exhibit monster or supernatural traits, though Corsair's specific background or origins remain undefined.

Integrated into group dynamics, Corsair interacts with main characters D'Artagnan and Shion, as well as secondary character Nonno. The idol actively contributes to the series' musical themes by performing the ending song "Zenryoku Idol Sengen♡," aligning with the central focus on pursuing idol careers.

Corsair maintains a consistent role as an idol within the ensemble cast, supporting the primary narrative throughout all appearances.