Initially, laid back and humorous, he enjoys teasing others, especially Dong-young. When his brother becomes involved with a scenario, however, he became more serious and loses his "funny, charming classmate" facade. During the rescue of Dong-Young's kidnapping, he tells his brother that he stayed with her because he knew that Ryung-Jin would some time approach the Princess, and it would make it easier for him to find Ryung. He goes on to say that he thinks Dong-Young to be nothing more than a tool to manipulate. However, he says this to try to get closer to his brother and actually loves the princess. Once Ryung agrees to make peace, Bi-Wal returns to his post as King of Hell. He marries Doung-young when she becomes Lord of Heaven and together, they live in a palace in the demon world.
