The Fifth Character is below!

Did you see him?

It's Cha Suengwon!

The Mentor/ Teacher!

Teacher Cha has a very mysterious past. He was Chanyeol's teacher together with another student. He has taught the art of fighting and is known to be one of the best teachers on this field. As a young man he was a Knight in the Palace...Why did he leave the palace? Why did he become a nomad going around villages and forrest? Why did he become a teacher/ mentor instead? And what wil be his involvement on the Circle of the Diamond?