Yeo Hee-soo is main villain of 2000 South Korean film Libera Me is
Yeo Hee-soo
unstable arsonist who witness his sister's suicide which kills their father by fire as child which left traumatized and become arsonist.

After 12 years of jail Hee-soo was released but he counted targeted people incldue children

in the end Hee-soo killed himself by gasoline fire which left Sang-woo and Min-sung escaped

He played by Cha Seung-won who played Son Hyuk  in ATHENA ,Park Moo-rang in 71:Into the Fire and Lee Mong-hak