유재석
With the huge success of "No-brain Survival", he eventually become an official member of top-rating comic variety program "Infinite Challenge" since March 2006 and as the second eldest member, he is positioned as "the third-in-command" (3인자), putting him below the host-in-chief Yoo Jae-suk and fellow co-host Park Myung-soo. Soon, he re-created his character as "Super-Fatty" (뚱뚱보), in contrast with the former "Fatty" (뚱보) and his long-time colleague on this programme, Jeong Hyeong-don.