He's a complex character, portrayed as serious, calculating, and always planning ahead. Erwin was often seen as a very grim individual. Although he is often level-headed and composed, he can easily become aggressive and violent within seconds. Many tend to find Erwin intimidating, especially when angry. He has devoted his life to the nation Marley and is a titan shifter, possessing the Colossal Titan. He is a cold-hearted warrior and isn't afraid to play dirty to achieve his goal by any means.