Bertie is an affluent twenty-something bachelor living comfortably in London. He enjoys fine dining, stylish clothing, leisurely mornings, and the absolute comfort of his flat, relying entirely on his valet to handle daily challenges. Guided by a strict personal code to never let a friend down, his good-natured naivete constantly draws him into chaotic situations, extortion schemes, and unwanted obligations.

Jeeves is Bertie's profoundly capable, impeccably mannered valet. He operates as the sensible, discreet voice of reason in Bertie's life, possessing an encyclopedic knowledge of literature, human psychology, tailoring, and the dark secrets of the British elite. He quietly manipulates events to protect his employer from social disaster while simultaneously advancing his own preferences.

Gussie is a socially awkward biology enthusiast with a singular obsession for studying newts. He lacks discretion and social grace, making him prone to alienating those around him. In an effort to overcome his extreme shyness regarding his upcoming wedding, he begins coldly cataloging the flaws of his future in-laws in a small notebook, creating a massive liability when he loses the text.

Stiffy is Sir Watkyn's niece and Madeline's headstrong cousin. She is a fiercely determined young woman who happily coerces others into taking massive risks to get exactly what she wants. She treats the people around her as pawns in her petty disputes, leveraging sensitive information to force Bertie into helping her secure her uncle's approval for her chosen husband.

Spode is a massive, aggressive man and the leader of a British fascist organization known as the Black Shorts. He operates as Sir Watkyn's enforcer, utilizing his intimidating physical presence to terrorize Bertie and Gussie. Despite his violent bluster and political posturing, he harbors a deeply guarded personal secret that contradicts his hyper-masculine public persona.

Sir Watkyn is a retired judge and serving Justice of the Peace who recently inherited a fortune and a large country estate. He is a cutthroat collector of antique silver who uses underhanded tactics to best his rivals. Having previously fined Bertie for a petty prank, he firmly believes the young man is a professional criminal and constantly looks for an excuse to send him to prison.

Madeline is Sir Watkyn's attractive but highly sentimental daughter. She operates under the firm, mistaken belief that Bertie harbors a tragic, unspoken love for her. Her extreme romanticism and constant jealousy regarding her fiancé create a volatile situation, keeping Bertie trapped in fear that he will be forced to marry her if her current engagement fails.

Dahlia is Bertie's boisterous, demanding aunt who runs a women's weekly magazine. She shamelessly leverages Bertie's love for her personal chef's cooking to coerce him into committing crimes on her husband's behalf. Like her nephew, she treats rules as optional when they interfere with her desires, though she possesses a much stronger and more forceful personality.

Harold, known as "Stinker" during his school days, is a local curate and an old college friend of Bertie's. He is good-hearted and athletic but notoriously clumsy, dim-witted, and easily manipulated. He blindly follows Stiffy's outrageous commands to commit petty crimes, believing it will somehow endear him to her strict uncle.

Oates is a local Scottish police officer working in the village near Totleigh Towers. He suffers frequent indignities, from dog attacks to stolen headwear, and serves as the unwitting pawn in Stiffy's petty revenge schemes. He eagerly assists Sir Watkyn in trying to pin local crimes on Bertie.

Tom is Aunt Dahlia's husband and an ardent collector of silver bric-a-brac. He operates as a bitter rival to Sir Watkyn Bassett in the antique market. His intense desire to acquire a specific silver cow-shaped creamer, and his subsequent incapacitation by cold lobster, sets the entire criminal plot in motion.

Anatole is Aunt Dahlia's legendary French chef. His culinary masterpieces are highly coveted by the British aristocracy, making him the ultimate bargaining chip. Bertie's absolute devotion to Anatole's cooking is the primary leverage Aunt Dahlia uses to force her nephew into dangerous situations.