Doo-Yeop, known as Yopy in Lucid Adventure, was the Guild Master of Yopy Land, the former King of Yopy Land, the former leader of The Eastern Alliance and was Ranked No.33 in the Lucid Ball Ranking System. Together with Akira, he won a previous iteration of The Combat Tournament.
During the war on Nightmare, Yopy was a constant thorn in Giga's side. He discovered that Lucid Adventure can only exist if the players exist.
(Source: Hardcore Leveling Warrior Wiki)
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