Yura – Woo Bin’s younger sister. She is 5 years old different with her brother. (You will know more about her through out this story, as we should keep her in secret).

Woo Bin - The only brother and sibling that she had. And, the only family that she has now.Their parents died in an accident 20 years ago. Yura has been raised by her brother and Aunty Mimi as her personal maid. From the outside, Woo Bin looks like the other rich guy with the sophisticated figure and flawless skin. Currently, he is the Director of BigEast PharmaceuticalCorp. and continues to run the business that their parents left behind.Woo Bin has 4 loyal followers that always stand behind him no matter what happen.

Soo Hyuk – Woo Bin’s right hand and his best man. He is a Neurosurgeon Hematologist in BigEast Hospitals. His looks seems cold but he is very warm hearted person. He always there when Woo Bin's need him. Among Woo Bin's friends, Yura loves him the most. It is because, Soo Hyuk always take care of her the most and always becomes her savior.

Sung Joon – Sung Joon is a very athletic person and he has an army force training since teenager. He loves to do something that related to tough and hardcore training. So, he is always be the one who guard Woo Bin's and the other.

Jong Suk – Jong Suk and Jong Hyun is the twin brother. Like a body needs two hands, it same goes to brain. There are both right and left side for the brain. So, Jong Suk is on the left side. As Jong Suk character, he is more mature and act like a big brother to Jong Hyun even though the fact is he is the youngest.

Jong Hyun – Jong Hyun is Jong Suk twin’s brother. Opposite to Jong Suk, he is on right side. As for Jong Hyun character, he is more lovely and cheerful. He loves music and theater. 

Kris Wu - One of the "Wolf" team that will be Yura's personal guard and at last fall in love with her.