Isaac Zack Foster is a tall, lanky young man with a visibly underweight, almost skeletal build. His skin is pale and uneven in tone, much of it hidden beneath layers of worn, grimy bandages that wrap around his neck, arms, and torso, concealing extensive burn scars and damaged tissue. His black hair is unkempt and jaggedly cut, falling messily over his forehead and around his ears. His eyes are a dull, washed-out yellow and green (since he has one pupil bigger than the other), often half-lidded 