Dae-wi Han

Han Dae-wi was a part of the legendary duo named Mad Cows. He is a very skilled fighter and was invited to participate in the God Of High School Tournament.
During Ragnarök, he received Ok-hwang's Wisdom of the Sage and in the process, chosen to be the next Jade Emperor.

17 years after Ragnarök, he rose to become one of The Six, known as Sage of the East, with his organization the 2nd in terms of power from World Government itself.

(Source: God of High School Wiki)