Name
Joined
Nickname
Character Description and Notes
Yu Jae-seok (유재석, Host-in-chief)
Since April 2005
the Class President Yu(유반장)[9] The First Member(1인자)
As a host-in-chief, he leads all Muhan Dojeon members to reach the goal of each episodes.
Park Myeong-su(박명수)
May - July 2005[10] Oct. 2005 - Incumbent
Big Star Park(박거성)[11] Father(아버지) The Second Member(2인자) The Son of Devil(악마의 아들)
His nickname(Geo-seong) has been continuously proclaimed by himself. He is often been named as "Father" by the rest of the members due to his elderly look and age. This happens if Myeong Su's hair is flattened or his make-up gets erased
Jeong Jun-ha(정준하)
Since March 2006
The Helmet(헬멧)[12], The Lord of Eating(식신)[13] The Third Member(3인자)
Due to the extraordinary size of his head (8kg) and huge amount of meals which he eats (in the 50th episode special-S03E50, he had a Challenge where he had to eat 50 plates of noodles in 300 seconds. The plates altogether was about 10-30 kilos. he succeeded, but he had to go straight to the lavatory and sleep at the back of the studio).
Roh Hong-cheol(노홍철)
Since April 2005
Stone-Kid('돌+아이')[14], Quickmouth(퀵마우스)[15]
'Dol+I' was created by Yu Jae-seok during the episode of S03E22. Quickmouth was his original character, due to his extremely fast speed of speech.
Ha Ha(하하)
Since December 2005
Shorty(height, 단신)[16] The M.A./Master of Arts(석사) Little One (꼬마)
As mentioned, and his seemingly stupid decisions he shows sometimes. He supposedly earned an M.A. from post-graduate work. (In the 50 special, he got a test for elementary students. He got 20 points. Also, flying to El Nido, he repeatedly showed off this fact.)
Jeong Hyeong-don(정형돈)
Since April 2005
Awkward Piggy (어색한 뚱보)[17]
During each episodes, he has been shown his ability for anything, except making laughs.(sometimes proved wrong)
NameJoinedNicknameCharacter De
(유재석, Host-in-chief) Since April 2005 the Class President Yu(유반장)[9]
The First Member(1인자) As a host-in-chief, he leads all Muhan Dojeon members to reach the goal of each episodes. Park Myeong-su(박명수) May - July 2005[10]
Oct. 2005 - Incumbent Big Star Park(박거성)[11]
Father(아버지)
The Second Member(2인자)
The Son of Devil(악마의 아들) His nickname(Geo-seong) has been continuously proclaimed by himself. He is often been named as "Father" by the rest of the members due to his elderly look and age. This happens if Myeong Su's hair is flattened or his make-up gets erased Jeong Jun-ha(정준하) Since March 2006 The Helmet(헬멧)[12],
The Lord of Eating(식신)[13]
The Third Member(3인자) Due to the extraordinary size of his head (8kg) and huge amount of meals which he eats (in the 50th episode special-S03E50, he had a Challenge where he had to eat 50 plates of noodles in 300 seconds. The plates altogether was about 10-30 kilos. he succeeded, but he had to go straight to the lavatory and sleep at the back of the studio). Roh Hong-cheol(노홍철) Since April 2005 Stone-Kid('돌+아이')[14],
Quickmouth(퀵마우스)[15] 'Dol+I' was created by Yu Jae-seok during the episode of S03E22. Quickmouth was his original character, due to his extremely fast speed of speech. Ha Ha(하하) Since December 2005 Shorty(height, 단신)[16]
The M.A./Master of Arts(석사)
Little One (꼬마) As mentioned, and his seemingly stupid decisions he shows sometimes. He supposedly earned an M.A. from post-graduate work. (In the 50 special, he got a test for elementary students. He got 20 points. Also, flying to El Nido, he repeatedly showed off this fact.) Jeong Hyeong-don(정형돈) Since April 2005 Awkward Piggy
(어색한 뚱보)[17] During each episodes, he has been shown his ability for anything, except making laughs.(sometimes proved wrong)