Ahn hyunseong has blond hair and sharp eyes. he wears a red turtleneck underneath. His right hand is more bumpy than other characters; it is implied that the bones in his right hand have been replaced with steel, he is an expert at fighting using only his right hand. He has a cold but flexible personality. He respects his senior Ma Tae-soo very much and considers him an idol. he possesses stoic tendencies with his conviction