Millie Kessler

Millie Kessler is portrayed as a timid, everyday high school student who is initially ordinary and somewhat unpopular, but her courage and resourcefulness shine through after a body-swap with a deranged serial killer.

Ordinary High School Persona: Millie begins the film as an “ordinary, boring” high school student, introduced through her own voiceover. She is depicted as timid, experiencing bullying, and not very popular among her peers. She presents a kind-hearted and relatable personality typical of a high school teen who does not stand out in social hierarchies. Her initial personality is subdued, polite, and unassuming, which makes the later transformation more prominent.

Post Body-Swap Traits: After the mystical dagger causes Millie to swap bodies with the serial killer, her personality traits are demonstrated through how others react to her new presentation. Vince Vaughn, portraying Millie’s body, needs to channel her timid and earnest characteristics for believability. Critics note that her personality is timid and cautious, contrasting sharply with the Butcher's aggressiveness, which reinforces Millie’s inherent gentle and conscientious nature. Despite the switch, she remains brave and resourceful, working quickly to restore her body within the 24-hour limit imposed by the spell.

Character Complexity: Millie's personality captures the classic “everygirl” archetype with a twist: she is initially unremarkable, but faced with extreme circumstances, she demonstrates resilience, intelligence, and courage, traits that stand out against the horror-comedy backdrop. Her interactions, especially as the audience sees her navigated being trapped in a killer’s body, highlight humor, vulnerability, and ingenuity. This mix of timidity and latent bravery makes Millie a relatable and compelling protagonist.

Hair and Facial Appearance: Millie is described as a blond-haired, blue-eyed, high school student, reflecting on a cheerful and approachable teenage look. Her facial features correspond with a typical teen aesthetic consistent with her portrayal by Kathryn Newton, presenting a youthful and friendly appearance.

Body Type: Before the body swap, Millie has a shy, bookish teenager’s frame, which is relatively slender, and petite compared to the Blissfield Butcher. The contrast in body types becomes central to the plot when she swaps bodies with the linebacker-like form of the adult serial killer. After the swap, her appearance in the butcher’s body is dramatically different — taller, more muscular, and physically imposing.

Age and Character Context: Millie is a high school senior, placing her at 18 years old. Her appearance reflects a typical teenage student trying to navigate high school life, including challenges like bullies and a strict teacher. Her visual traits support her characterization as an energetic, slightly timid teen who becomes unexpectedly courageous due to the body swap scenario.