Flannel Shirt: Wears a short-sleeved, black and red checkered button-up flannel shirt with the collar popped up. No Suspenders: Unlike Jackson, William's outfit is more minimal and does not feature suspenders. Pants & Footwear: He wears a standard pair of dark blue jeans paired with heavy-duty work boots. Cleanliness: His clothes are noticeably clean and neatly kept, completely contrasting his brother's blood-soaked, filthy attire. Height: He stands at 1.83 meters tall, making him slightly taller than Jackson. Age: 20 Hair: He has neat, dark brown hair that sweeps over his face, completely obscuring the entire right side of his head. Skin Tone: He has a healthy, normal tan skin tone. Injuries: He has no scars, missing digits, or blemishes. He remains completely unfazed and uninjured, even when Jackson holds a meat cleaver to his neck. Surly & Blunt: William is inherently cold, huraño, and straightforward. He does not tolerate foolishness and speaks with stern authority, often having to discipline or reprimand his chaotic brother. Grounded & Calculated: He is a far more rational, quiet, and logical individual. He serves as the anchor of the duo, managing the heavy physical labor, the livestock, and tracking down escaping victims while Jackson slacks off. Sadistic Underneath: Though he appears much tamer and calmer than Jackson, his true sadistic and psychopathic nature slips through in rare moments when a creepy smile appears on his face. Protective Older Brother: Despite being incredibly tough on Jackson, William cares for him deeply. Following their mother's tragic passing, he took on a fiercely protective role to guide and look after his younger sibling. Scientific & Diligent: While Jackson relies on blind religious delusion, William handles the experimental logistics. Notes reveal he actively studies the mysterious green hearts, logs their progress, and takes direct accountability for coordinating their experiments to bring back "Mama".

Flannel Shirt: He wears a long-sleeved, solid red flannel shirt with a single button left undone at the collar. Suspenders: A key difference from William, Jackson wears a pair of black suspenders snapped onto his pants. Pants & Footwear: He wears a standard pair of dark blue jeans tucked into sturdy boots. Signature Accessory: He is practically never seen without his primary weapon, a massive meat cleaver that he affectionately named "Hilda" Height: Stands at 1.80 meters tall, making him slightly shorter than William. He is deeply insecure about this height difference. Age: 20 Hair: Short, black hair that is parted directly down the center and cut shorter in the back. Hygiene: Unlike his neatly kept brother, Jackson is incredibly unkempt and messy. He explicitly smells like a mix of blood and sweat. Injuries: Due to his reckless habit of throwing his cleaver in the air, he has cut his own fingers off multiple times, leaving them poorly reattached and numb. Sadistic Showman: Jackson is incredibly charismatic, flamboyant, and theatrical. He actively takes charge of dramatic introductions, laughing and maintaining a joyful, upbeat attitude even while dismembering survivors. Childish & Lazy: He is highly immature compared to William. He avoids his chores, refuses to do laundry despite having two washing machines, something that his brother complains about. Volatile & Impulsive: He behaves purely on emotion. He is prone to massive spontaneous emotional outbursts and violent tantrums, often brandishing or throwing his cleaver. Religiously Devoted: He holds an intense, fanatical religious devotion to an entity he calls "The Lord". His cheerful demeanor completely drops into a chilling, dead-serious clarity whenever he speaks about his faith or his goal to resurrect their "Mama".