Colonel Snidel is a character who appears as the main antagonist in the SPY×FAMILY movie Code: White. He holds the rank of colonel within Ostania's Military Intelligence Special Reconnaissance Regiment. His primary background and core motivation stem from a desire to shatter the fragile peace between the East and West, as he is a military officer who seeks to overturn the current ceasefire and instigate a full-scale war.

In terms of physical appearance, Snidel is a large man with a stocky build, slicked-back medium-length brown hair featuring two distinctive light-colored locks, and sharp light blue eyes. He typically wears the uniform of his regiment, topped with a dark green military trench coat that has a red lining. A notable aspect of his character is his identity as a gourmand, which is reflected in his attire as he carries various cooking-themed items, including a napkin around his neck, seasonings on his belt, and a stirrer-shaped cane.

Snidel's personality is defined by cruelty and a vicious, ruthless nature. He is willing to go to any lengths to accomplish his goal of restarting the war, showing a complete lack of moral restraint. This is most starkly illustrated by his repeated and serious intent to murder a young child, Anya Forger, in order to secure a microfilm he believes she has ingested. While he commands a degree of respect from his subordinates through his leadership, he does not hesitate to threaten or even kill them if they become an obstacle or a threat to his mission, as demonstrated when he executes one of his own officers for being a traitor leaking information to the Westalian intelligence agency WISE.

Snidel's role in the story is that of the primary threat the Forger family must overcome. His regiment has stolen a vital microfilm containing information crucial to their war plans. The plot is set in motion when Anya accidentally swallows the chocolate in which the microfilm is hidden. Consequently, Snidel dedicates his entire operation, including a massive flying battleship named Enormity, to hunting down Anya and retrieving the film, placing the Forgers directly in his crosshairs. His key relationships are primarily with his subordinates, including his soldiers Domitri and Luca, whom he tasks with capturing and guarding Anya. He is also the direct adversary of Loid Forger, whom he first meets in a culinary competition and later faces in a physical confrontation, and of Yor Forger, against whom he deploys a special mechanical soldier, Type F.

The character shows limited development within the film, remaining a steadfast and unwavering villain driven by his goal. His primary narrative development is his eventual defeat at the hands of Loid Forger. After a confrontation on the bridge of his airship, Loid outmaneuvers and overpowers him, putting him in a chokehold until he loses consciousness. Following his defeat, Loid orders the other soldiers to abandon the ship and take the real Snidel with them, leaving his ultimate fate unknown.

Colonel Snidel possesses several notable abilities. He is a skilled hand-to-hand combatant, capable of going toe-to-toe with the highly capable spy Loid for a period, though he is ultimately overpowered. His most remarkable talents are his enhanced senses. He has an incredibly acute sense of smell, which he uses to see through Loid's disguise and expose him as an imposter on the airship, having recognized his city scent from their earlier encounter at the restaurant. He also possesses a highly refined sense of taste, a skill he takes great pride in as a gourmand. This is demonstrated during a competition with Loid where he cannot merely identify the types of sugar in various cakes but also specifies the exact number of grams used, showcasing his extraordinary palate.