He's a violent mobster who is willing to betray the other players (including his allies and Han Mi-nyeo) out of selfishness and cowardice. Furthermore, he teased Kang Sae-byeok for being North Korean, he gloated about winning the other games (such as tug of war and marbles), he stole the food from the rest of the players and killed one of them with the broken bottle, and he resorted in massacring players during riot.
