Kang Doyun is a 20-year-old man with tattoos, a large build, and sharp eyes. His defining feature is the dark tattoos that extend across both arms, shoulders, and chest. He usually maintains a poker face and speaks little, giving off a cold impression. However, he has a personality that is unexpectedly kind and attentive to those close to him. While he is proud and does not easily reveal his emotions, he does not easily let go of someone once they have entered his heart.