Played by Koo Hye Sun
Geum Jan Di is from a poor family with a fierce and weed-like determination. She first liked Ji Hoo, who was the only one who showed any compassion while she was bullied. Eventually Jun Pyo begins to fall in love with her, and as he expresses his feelings to her through his actions, she gradually begins to reciprocate those feelings. Jan Di later is determined to pursue the medical industry after realizing she can't swim because of her shoulder.
Boys Before Flowers
Koo Hye Sun
While delivering a student’s dry cleaning, Geum Jan Di saves the life of a student at the most prestigious school in Korea. Her actions soon become public and exposes the bullying within the school. To silence the public’s attention, Jan Di is offered a swimming scholarship to Shinhwa which she declines but her family forces her to attend.
During her first day at Shinhwa, Jan Di learns of the famous F4 and of the other students' adoration and fixation with the boys in the group. Gu Jun Pyo, Yoon Ji Hoo, So Yi Jung, and Song Woo Bin are the richest and most powerful kids within Shinhwa and Korea. Subsequently, they use their power to terrorize weaker students or those they do not like. Jan Di, instead of being impressed, becomes enraged and fantasizes about confronting Gu Jun Pyo, the leader and initiator of many of the bullying acts. She gains courage to confront him when a friend accidentally spills ice cream on his shoes and he demands the girl lick it off. Jan Di defends her friend and attempts to reason with Jun Pyo’s tyrannical demand. When he refuses to relent, Jan Di turns violent, knocking Jun Pyo to the ground. Engaged by this, Gu Jun Pyo declares war on Jan Di and encourages the other students to bully her. Jan Di, however, is resistant, refusing to apologize to Gu Jun Pyo, and stands by her decision to fight him.
Ironically, Gu Jun Pyo, having never been stood up to, begins to develop feelings for her. He tries unsuccessfully to woo her as she slowly begins to spend more time with Jun Pyo and his friends. Jan Di teaches Jun Pyo that money cannot buy everything and in order to have real friends, he himself must be real or use his heart, but Gu Jun Pyo still does not understand why someone like Jan Di should dislike him. As the story progresses, Jun Pyo falls deeper in love with Jan Di and she learns how to open herself to his love as well.
Goo Hye Sun
(Korean: 구혜선) is a South Korean popular actress and also a singer, who has recently gained fame in a hit drama, Pure in Heart (열 아홉 순정) as a starring role, Gukhwa and also sang the title song of it. She is well-known for protraying Geum Jan Di in KBS2 drama Boys Over Flowers.
She also has gained attention for appearing as a cameo role in the film, August Rush as one beggar. She is in YG Entertainment. She started debuting in drama by appearing in 2005's Nonstop 5.