Greivis' appearance is described as a man, 186 centimeters tall, with a strong build. He has a short blond beard and short blond hair. He typically wears tactical body armor, a crash helmet, and other military gear to ensure he is ready for combat operations. In terms of character, Greivis is usually shown as a skilled and determined fighter. He is highly professional and strives to perform his tasks accurately and efficiently. He has leadership qualities. Teasing, cold-blooded.