Diana Caprice serves as a steadfast ally to Shinjiro Taiga, guiding his transition into New York City’s bustling rhythms and the hidden demands of his role. A key member of the New York Combat Revue, she fights to protect the city from supernatural incursions by piloting Super Telekinetic Assault Robots—advanced mechanized units central to the group’s operations. The Combat Revue operates under the dual facade of a theater troupe, seamlessly blending public spectacles with covert demon-hunting missions.

Her time with Shinjiro unfolds during exploratory phases across the city, where she aids his acclimation alongside fellow Revue performers. Their bond deepens through dialogue choices that shape their dynamic, though Diana’s past and personal struggles remain unexplored. In clashes against adversaries such as Ranmaru and Oda Nobunaga, she deploys combat expertise tailored to her tactical position, supporting team strategies during critical battles.

The narrative’s climax unites the Revue in a decisive strike against Nobunaga’s legion, with Diana contributing as part of the unified front rather than through an individualized journey. Post-battle outcomes shift based on player-driven choices, though her personal story lacks a distinct epilogue, remaining entwined with the ensemble’s resolution.