Mark is a young boy with a slim, delicate build and softly feminine features—so much so that he is frequently mistaken for a girl. He possesses a remarkably striking face that naturally draws attention from everyone around him, framed by soft, messy curl patterns and framed by devastatingly large doe eyes. Despite his captivating looks, he has been entirely emotionless since birth. His expression remains permanently flat and unbothered, showing neither warmth nor malice—only complete indifference. When he speaks, he uses short, blunt sentences, answering with direct, matter-of-fact logic and zero attitude.