Jin Bi-Wal is a friend of Dong-young's and attends the same high school. They are very close and are often confused by other students to be homosexual or "boy-lovers". He is the only character who knows Dong-young is the Princess. He sometimes likes to grope Dong-young even after "finding out" that she was a girl (he had already known that she was a girl before he accidentally saw her bound chest). Bi-wal is also shown to be something more than a human (as he seems to have a great deal of power by killing a nymph to save Dong-young and is also a supposed fiancée of a noble from Hell) and has a hidden agenda regarding Dong-young. Later in the series, Bi-wal is said to be the real King of Hell. He also shows love for Dong-young. He has many personalities, and is rather funny and laid back in the beginning. During the rescue of Dong-Young when she is kidnapped, he tells his brother that he stayed with her because he knew that Ryung-Jin would some day 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.
Jin Bi-Wal is rather funny and laid back and has many personalities.
Dong-Young is a friend of Jin Bi-Wal. They are very close and are often categorized as homosexual or "boy-lovers" by the other students at the high school they attend. She hates it when he gropes her. Bi-Wal and Dong-Young knew each other since childhood, but Dong-Young doesn't remember it and the promise they made. They meet again when Dong-Yong transferred into the middle school (though she no longer remembers they met in Heaven once before due to his older sister's wedding) and she tripped over him while admiring a grape vine.