Big sisters are mostly all insane from their conditioning, due to that when they approach someone with the intent to kill they let out are ear piercing animalistic screech. They wear a tan undersuit with a corset over it, large brown gloves with bronze/rusted metal plating, they require two leg braces due to their lanky limbs, due to the lankiness it causes awkward stances like being hunched over or having a stance like having weak knees. They are protective of the little sisters.