Yakov is a tall young man with very pale skin. He has short ash-colored hair and black squinted eyes, under which bags are visible, caused by frequent insomnia and lack of sleep. The lower part of the face is usually hidden by a black mask with the alchemical symbol "Great Work". The young man has a complicated character. The young man has a complicated character. He also constantly watches the main character because of distrust of him. Hinedere is a violent character, but can be treated well.