Boy Main(ghost): Jang Keun Suk(you)

He's cute and very nice but naughty at the same time.He's a boy who can't be seen and heard.He's alone and he kind of enjoyed being a ghost at first...

Girl Main:Lee Ji-eun(IU)

She's a girl who likes to play alot but she's very shy.She's also very kind.

Lee Ji-eun's brother :Lee Chan Hee (Chunji)

He's very cute.He protects his sister and likes to play with her.He's also very kind but when someone makes his sister cry,he get's really mad and mean.