Marcus is a blue-eyed elderly man with slicked back silver and facial hair that covers his whole face. He's often well kept and usually wears a suit. Though he seems very intimidating to the average hunter, according to the Sword Emperor he is genuinely a kind individual. He has a strong moral code against cold-blooded killers, even threatening to kill Kim Gong-Ja after his skill 'Detective's Insight' determined that he was a murderer.