Luka is a supporting antagonist introduced in the original film Spy x Family Code: White, which presents a standalone story separate from the main anime series. He is a member of Ostania's Military Intelligence Special Reconnaissance Regiment, serving as a soldier within the nation's armed forces. Luka operates as the partner of Domitri, and together the two form a notable duo that pursues the Forger family during the events of the film. In terms of physical appearance, Luka is depicted as a large, muscular man with a rugged and imposing build, which stands in direct contrast to his partner Domitri, who is thin and slender. This visual contrast makes them an unconventional and somewhat comedic pair. Luka's personality reflects his tough exterior, as he is portrayed as being relatively unintelligent and straightforward, lacking the cunning or strategic thinking of other antagonists in the story. However, what he lacks in intellect he compensates for with raw physical strength and resilience. He possesses tremendous physical power, making him a dangerous opponent in direct combat, and his brute force is his most notable ability. His motivations are tied to his role as a military operative, as he works under the command of Colonel Snidel, the film's primary antagonist, who seeks to use a hidden microfilm to trigger a war between Ostania and Westalis. Luka, along with Domitri, is tasked with retrieving the microfilm after it is accidentally consumed by Anya Forger. This mission leads him to pursue the Forger family across various locations, including a train and eventually an airship. His role in the story is that of a pursuer and enforcer, creating obstacles and threats for the protagonists while serving as a physical challenge that contrasts with the more cerebral threats posed by other characters. Luka's key relationship is with his partner Domitri, with whom he shares a close working dynamic that relies on Domitri's more cunning nature to balance Luka's straightforward and physically oriented approach. Luka also interacts with members of the Forger family, particularly Anya, whom he and Domitri attempt to capture. Throughout the film, Luka does not undergo significant character development, as he remains a consistent antagonist whose primary function is to provide physical opposition and comedic relief through his dim-witted demeanor and imposing presence. His notable abilities are centered entirely on his superhuman strength and durability, which make him a formidable threat in hand-to-hand combat and physical confrontations.