Nora Floriann Leoria is an operative of the Runaway Spirit Squad, a demon unit within New Hell's Bureau of Spirit Affairs. Her core mission is tracking and capturing escaped spirits possessing humans on Earth, reporting directly to squad leader Dokurou Skull.

Tasked with monitoring Keima Katsuragi's efforts to awaken the Jupiter Sisters (goddesses within his prior conquests), Nora suspects Keima might be compromised. This skepticism drives her to confront him directly. She brokers a conditional agreement: Nora will withhold reporting his activities for one week if he successfully awakens all remaining goddesses within that timeframe, showcasing her pragmatic approach to mission objectives.

When the rogue faction Vintage escalates its campaign to eliminate the goddesses, Nora shifts from observer to active combatant. She allies with Keima and Haqua du Lot Herminium to protect the goddess hosts, directly engaging Vintage operatives to prevent the revival of Old Hell and safeguard Earth's stability.

Nora operates with a focus on efficiency and results. While initially adversarial towards Keima, her subsequent alliance demonstrates adaptability in prioritizing mission success. Her actions prove crucial in countering Vintage's assaults during critical engagements.