Lee Bo-na, portrayed by Krystal Jung in “The Heirs,” is a cheerful and somewhat spoiled heiress who is deeply in love with her boyfriend, Yoon Chan-young. Despite her privileged background, she is friendly and loyal, often providing comic relief in the series. Bo-na’s character is marked by her possessiveness over Chan-young and her occasional jealousy, but she also shows growth and maturity as the story progresses