Foster, Isaac
Summary
Isaac Foster is a 20-year-old male with a birthday on July 24, standing 186 cm tall. He has black hair and heterochromatic eyes, black on the right and gold on the left, with a B blood type. Often referred to as Zack, he is known for his foul language, frequently swearing even toward Rachel despite her young age. He lacks formal education and cannot read, becoming frustrated by complex explanations and preferring simple terms. Due to this, he often relies on Rachel for problem-solving. Zack suffers from a mental disability characterized by an uncontrollable urge to destroy and kill. When his blood rushes, he loses control and enters a destructive phase until satisfied or rehabilitated. While not academically intelligent, he possesses high instinctive and survival intelligence, relying on instinct to navigate situations. This sharp intuition helped him survive childhood and is likened to animalistic cunning. He is also extremely strong and fast, balancing his lack of academic smarts with physical power. Zack is brutally honest, hating liars and never sugarcoating his words. As a child, Zack was quiet and reserved, rarely speaking. His first murder occurred in an abusive, run-down orphanage where caretakers called him a monster and forced him to bury dead children. Fascinated by a horror film featuring a serial killer, he mimicked the behavior and mutilated his caretakers, burying them in the back. Years later, his recent killings have made him a wanted criminal.
