Main Characters Nam Si Hun / Nam Si Hun in Goo Yeon Jun's body 12 main appearances Jung In Gyu 12 main appearances Han Joon Hee / Han Joon Hee in Kwon Min Joo's body 12 main appearances Kwon Min Joo 9 main appearances Goo Yeon Jun 1 main appearances
Recurring Guest Characters Bae Chi Won 11 guest appearances Oh Chan Yeong / Oh Chan Yeong in Oh Chan Hee's body 8 guest appearances Bae Mi Yeong 7 guest appearances Seo Na Eun 2 guest appearances Oh Chan Hee 2 guest appearances Dr. Choi Myung Il 1 guest appearances Ki Won 1 guest appearances Detective Se Kwon 1 guest appearances