Lee Joon (lee Chang Sun

 He is the most popular of the boys, and always has trouble keeping down a part-time job because his fans will chase after him, or his boss (male or female) will ually harass him. He left his hometown because his family was unable to take the strain of his fans constantly harassing and mobbing them.Lee Joon is cocky, short-tempered, selfish, blunt, demanding, and having no inclination to be gentle towards Soo Min unless it is for the rent.And the only one tough enough to fight on the same level as Soo Min. He's  16 years old and he also tends to succumb to food and money. He loves fights (either watching it or doing it) and he loves to eat, especially Soo Min's cooking. 

Park Sang Hyun

The most intellectual of the four, Sang Hyun is the least fazed by Soo Min's morbid habits. When the quartet dress Soo Min up, he is usually responsible for doing Sunako's hair. He's 16 years old, as Lee Joon is. Sang Hyun was originally from a wealthy family descended from flower masters, but when the pressure of being the family heir was too much, he became completely withdrawn and ignored everyone. He was sent to live at the Landlady's mansion in hopes of becoming more "normal". He is described as a caring guy and is rather shy. He is currently going out with Lee Ji-eun.

Jung Byung Hee

A ladies' man, Byung Hee (even if he's 18 years old)is often going out with various beautiful (and often older) women. The very sight of   Soo Min initially has him breaking out in hives, but when her true beauty is revealed, he decides that she has "potential" to become a real lady. Like Sang Hyun, he comes from a wealthy family (who own a series of hotel chains), but was sent to live with the Landlady because he exploited his wealth and his parents wanted him to become "normal". Surprisingly, Byung Hee is actually better at martial artes than Sang Hyun, who comes from a traditional family. He apparently is the strongest advocate of making Soo Min into lady. 

Bang Chul Yong (Mir)

The most cutest and youngest of the five, Chul Yong is initially the most frightened of Soo Min. He is 15 years old (same as Soo Min) and also came from a wealthy family.His mother and the Landlady are old friends and the Landlady, and Soo Min at times, has a soft spot for him. The only problem about him is sometimes, he uses his looks and his wealthiness to get what he wants. That's one of the reasons why he was sent to that boarding house--so he can change that manner of his.

Yang Seung Ho

He's the most "normal" of the four boys; before coming to live at the mansion he had a normal school life with a middle-class family. He is in the same age as Byung Hee. His mother and the Landlady are also old friends and the Landlady, and Sunako at times, has a good spot for Seung Ho. 

Lee Ji-Eun (IU)

A very pretty and exceedingly popular girl. She loves being called beautiful by the others, especially by Soo Min. She's the same age as Soo Min. Ji-Eun is Soo Min's closest friend at school, where Soo Min is scorned for her terrifying demeanor and association with the boys. She admires Soo Min's tough attitude. Ji-Eun is in love with Sang Hyun, though she tends to be insecure about their relationship because Sang Hyun is too shy to openly admit that he likes her.

Title:The Wallflower