Shadow Milk Cookie is a Beast Cookie who serves as a major antagonist in Cookie Run: Kingdom, embodying the corrupted force of Deceit. Once associated with knowledge and truth, he now delights in manipulation, illusions, and spreading confusion wherever he goes. He has pale blue dough, long blue-and-black hair styled like a jester's cap, mismatched blue eyes, and a dramatic harlequin-inspired outfit decorated with eye motifs and dark diamond patterns. Despite his playful, theatrical demeanor, Shadow Milk Cookie is highly intelligent, cunning, and unpredictable, treating every encounter like a performance while skillfully twisting reality and the truth to suit his own amusement.

Candy Apple Cookie is an Epic Bomber Cookie and a devoted servant of Shadow Milk Cookie, dedicated to spreading deception and chaos in hopes of earning his approval. She is a small Cookie with pale dough, bright scarlet eyes, white hair accented with a pink stripe, candy-apple-shaped pigtails tied with black bows, and decorative black horns and bat-like wings. Her outfit consists of a Victorian-inspired black dress with white ruffles, striped stockings, and platform Mary Janes. Beneath her sweet, childlike appearance lies a mischievous and cunning trickster who loves telling lies, playing pranks, and manipulating others with an innocent smile. Despite her confidence and playful cruelty, she secretly fears being unwanted and constantly seeks validation from Shadow Milk Cookie, making her loyalty to him nearly obsessive.

Black Sapphire Cookie is an Epic Support Cookie and a devoted follower of Shadow Milk Cookie, using rumors, gossip, and deception to spread his master's influence across Earthbread. Tall and elegant, he has grayish-purple dough, fluffy black hair edged in violet that covers one eye, dark horns tipped with amethyst, bat-like wings, and a sophisticated black suit adorned with gold embroidery, gemstones, and a white cravat. Carrying an eye-shaped microphone gifted by Shadow Milk Cookie, he presents himself as a charming radio host and entertainer. Beneath his polished and theatrical demeanor, however, Black Sapphire Cookie is sly, manipulative, and deeply amused by chaos, delighting in twisting words, spreading falsehoods, and watching the trouble his rumors create while remaining calm, confident, and rarely losing his composure.