Atre, the disciplined tutor of Ecute—a vampire princess from Hell Transylvania—enforces aristocratic vampire protocols while curbing her charge’s volatile impulses. Prone to explosive outbursts when provoked, he struggles to temper Ecute’s rebellious nature. During their abrupt debut in the anime’s third season, highlighted as central figures but confined to the last two episodes, their rushed integration sparked continuity challenges.

Their primary arc revolves around masterminding a covert operation to breach Yurine’s home and convert her into a vampire. The scheme unravels when Jashin-chan sabotages their access by feigning amnesia about her summoning bond to Yurine. Despite meticulous planning, Atre’s repeated failures underscore his dogged but inept execution of responsibilities, leaving their ambitions perpetually unfulfilled.