Yi Sung Sun (이성순, 李聖淳, February 29, 1916 – January 25, 1983), nicknamed Sirasoni(시라소니),[1] was a South Korean street knight.
[2] He was born in 1916, in the North Korean city of Sinuiju.
After the independence of Korea, Yi ran away to South Korea to join with his gangster friend Yi Hwa-ryong's gangs of Myeongdong.
After the Korean War broke out, Yi worked in the Headquarters of the Intelligence Detachment.
Yi left the gangs, and escorted Chang Myon and Shin Ik-Hee from political hoodlums.