Sim-dan (played by Dong Ha) is a protagonist in Hero.
Eun-seok (played by Han Jeong-woo) appears in Hero.
Mi-ah (played by Lee Da-in) appears in Hero.
Lee Yoo-ri (played by Han Ye-won) appears in Hero.
Cheol-seung (played by Kwak Min-ho) appears in Hero.
Ji-in (played by Leah Kim Thompson) appears in Hero.
Ga-hoo (played by Son Ho-young) appears in Hero.
