Lessar operates as a magician within the New Light organization, initially introduced as an antagonist before shifting to an ally role. Her distinctive appearance features black hair accented by yellow-dyed bangs framing both sides of her face, paired with New Light's signature uniform: a white jacket and undershirt sporting red and blue sleeves emblazoned with the N∴L∴ insignia, completed by a coordinating miniskirt. Concealed beneath this skirt resides her dragon-tail spiritual item, essential for maintaining balance during aerial maneuvers—a necessity contrasting sharply with her underlying fear of heights. She exhibits a loud, energetic personality prone to drawing attention and struggles with subtlety. Lessar's thought patterns often center on herself, leading to frequent mid-conversation self-dialogue. She demonstrates notable persistence in attempts to seduce Kamijou Touma, openly pursuing recruitment into New Light for the United Kingdom's strategic advantage. These efforts included an aggressive advance within a confined Russian space and visible annoyance when snowfall prematurely revealed her undergarments, lamenting the lost opportunity to deploy this "secret weapon" for seduction. Her primary loyalty lies with the UK's welfare, a commitment extending to actions against her nation or others if deemed beneficial. This focus, alongside her tendency to emphasize positives while downplaying negatives, frequently irritates comrades. Commissioned by Princess Carissa, New Light successfully excavated the lost magical artifact Curtana Original from Edinburgh. Lessar participated in transporting the artifact to London. During this mission, her Steel Glove spiritual item identified her to adversaries Touma and Oriana Thomson, triggering a rooftop pursuit. Utilizing a pumpkin-shaped communication device, Lessar warned Touma against meddling in UK affairs, declaring New Light's objective to forcibly alter the nation's trajectory and prevent impending war. The confrontation concluded when a sniper wounded her, compelling Touma to carry her to the Necessarius Women's Dormitory for treatment amid the British Halloween crisis. Following Princess Carissa's coup initiation and Queen Elizard's distribution of the Curtana Original's power via the Union Jack, Lessar and New Light aligned with the rebellion. Bayloupe contacted Lessar and fellow members to strategize their path forward, reaffirming their dedication to acting in the UK's best interests despite supporting the coup.