Positive: Intelligent, passionate, dedicated, determined, and empathetic. Negative: Emotionally unstable, workaholic, sleep deprived, and sometimes rigid. Dr. Charles is a tall, slender person with a medium build. skin is pale and their hair, although a dark brown color, is often unkempt and matted, reflecting the long hours spent in the lab and the stress of their situation. dark circles under their eyes, indicating their sleep deprivation from constant work and their overall poor mental health