Wentian Sword Lin Tian: Male, a prince of a certain king, who was expelled from the palace at an early age because he was framed. Occupation: Assassin, charlatan, one of the four secret guardians, the protagonist.
Ruthless Sword Su Sheng: Male, the prince of a certain country. After the country was destroyed, he found out that his lover was actually an enemy spy. In regret, he killed his lover with his own hands and then lived in the Central Plains. By accident, he became a life-and-death friend with Lin Tian. Occupation: Killer, one of the four secret guardians, the protagonist.