People around the four Knights ДЄ university student majoring in fashion design. He protects Haneul Group by voting against the removal of chairman Kang, going against Chairman Kang's fifth wife, who is turns out to be his mother. He treats Ha-won well and helps her settle into her new environment at Sky House. The secretary of Chairman Kang, and bodyguard to the three Kang cousins and Ha-won. In the finale, it is hinted that he possibly ended up with Ja-yeong. He gives up his first love as he gets to know about Ha-won and Ji-woon's relationship.

He is a sweet, playful guy who is affectionate towards Ha-won whom he starts developing feelings for. The youngest cousin, a popular singer-songwriter. He has a troubled relationship with his mother due her constantly pushing him to be Haneul Group's successor, and for abandoning him when he was younger, only coming back to ask about his position. As the time comes, he realizes his foolishness for pushing Hye-ji away and apologizes to her for what he did and returns to her, his first true love. However, he is still in love with Hye-ji, his childhood friend and his dead best friend's sister, but he hides the fact and chose to push her away due to his childhood trauma. At first, he appears to take an interest in Ha-won and pretends to be Ha-won's fiancГ©. The eldest cousin, an arrogant playboy who is used to getting whatever he wants. It is suggested that their friendship was a brief one as they could not recognize each other when they were reunited after 10 years. He originally met Ha-won at his mother's double funeral with Ha-won's mother, and gave words of comfort and his white arm band to her, while she gave him her white ribbon hair pin. However, as he gets to know Ha-won, he gradually falls in love with her. At first, he tries to get closer to Ha-won in order to protect Hye-ji, who likes Hyun-min. Although he seems to be wild and rebellious on the outside, he is soft-hearted, extremely lonely and sensitive on the inside. The middle cousin, who went from an orphan living in poverty to a royalty overnight. Their friendship was a brief one, so they could not recognize each other when reunited after 10 years. She met Kang Ji-woon at their mothersвЂ™ funerals, giving him her white ribbon hair pin and he gave her his white arm band.

In order to pay for her college tuition, she accepts an invitation to the Sky House and gets entangled with the Kang cousins. Ever since her mother died, she lives a terrible home life because of the ill-treatment from her new stepmother and stepsister. Rounding out the mansion's chaebol lifestyle are Lee Yoon-sung ( Choi Min) who serves as the cousins' handsome bodyguard, and Park Hye-ji ( Son Na-eun), a girl who has been neighbors and in love with Hyun-min since childhood.Д¬ast Main Cinderella ДЄ smart, athletic high school student.

Between the rebel-minded loner Kang Ji-woon ( Jung Il-woo), playboy money machine Kang Hyun-min ( Ahn Jae-hyun) and the super-sweet singer Kang Seo-woo ( Lee Jung-shin), Ha-won finds herself in the middle of the hottest love quadrangle to ever befall a modern fairy tale. She meets an older man, chairman of large corporation who convinces her to move into his mansion with his three grandsons who are heirs to his family fortune. She is forced to take on part-time jobs to make payments for her mother's memorial and her college tuition. When her father remarries and a cruel stepmother moves in and steals Ha-won's college tuition. Unfortunately, she loses her mother in a tragic accident. Eun Ha-won ( Park So-dam) is a bright high school senior who dreams of becoming a teacher.

Cinderella and four knights ep 2