Elva is a Dayerehan twin with silver hair, light grayish skin, and red eyes. She initially appears quiet, innocent, and distrustful. Acting under Grand Duke Rugis F. Camellia's orders, Elva and her twin Saria orchestrated a merchant massacre to summon demons, then infiltrated the Kingdom of Hortensia disguised as orphaned children. Their innocent facade hides a manipulative and cruel nature. Both possess high intellectual abilities dedicated solely to achieving their objectives through any means, including assassination and betrayal. Elva and Saria wield dark magic to summon monsters and display combat prowess, notably during an attack on a Hortensian church to retrieve a relic. They confront Alfred Albert's group in the capital, confessing allegiance to Rugis and their murders. Although expressing reluctance to kill Alfred due to his past kindness, they prioritize their mission over personal connections. Their abilities include creating illusions based on memories, transforming into their opponents' worst fears, and neutralizing others' powers, though countered by high-level combatants like Didier Viardot. The twins maintain exclusive loyalty to Rugis's cause, showing no remorse for their actions or lives lost. Their Dayerehan heritage, from a nation historically hostile to Hortensia, positions them as agents exploiting the chaos of Rugis's rebellion to advance their goals.