Butler acts as personal attendant to Caviar-kun, formally named Ossetra Sevruga von Beluga, scion of a wealthy family. His core duty centers on fulfilling Caviar-kun's every requirement, guaranteeing constant comfort and satisfaction. Butler commands exhaustive culinary knowledge, operating as a walking food encyclopedia who routinely delivers intricate explanations on gastronomic subjects. This specialized expertise consistently shapes their interactions within their environment.