Joo Da-hae is the main antagonist of the 2013 Korean television series Queen of Ambition. She is the former lover of Ha-ryu whom she betrayed.
She was portrayed by Soo Ae.
Da-hae's father passed away after he killed himself in the van when she was younger and her mother abandoned her at orphanage, there she met Ha-ryu whose twin brother was adopted by family and become friends. Her mother was remarried took Da-hae leaving Ha-ryu at teenage years when Da-hae was raped by her stepfather before she reunited with Ha-ryu, when her mother passed away Ha-ryu was one to taken care of her. She become hostess almost when Ha-ryu return to money to boss and beaten him.
And then, her stepfather finds her after being released from jail. He tracked her before Da-hae kills him by Knife in self-defense.
Ha-ryu and Da-hae fell in love and had a daughter named Eun-Byeol but they never married. Ha-ryu worked as a host to supported his family before Da-hae discovered it. She met Baek Do-hoon who was ceo of Baekhak and abandoned her family by greed and Eun-byeol passed away by car accident and she framed Ha-ryu for that. Despite struggling to overcome her daughter's death, Da-hee was engaged with Do-hoon only she become a victim of jealousy by Do-hoon's sister. Do-kyung who happened be his mother and Ha-ryu met his long-lost twin brother Cha Jae Woong who was a lawyer who later died by plan and took his name with help of Suk Soo Jung who was later become Da-hae's stepdaughter.
Da-hae become terrified to see Ha-ryu's appearance being included one of her plans; he almost ruined her wedding with Do-hoon and slapped each other after kidnapping. Until then, Do-hoon discovered the truth about his wife and Da-hee kills him, Do-kyung begged Ha-ryu to seek revenge and Da-hae met his second husband - Suk Tae Il whom she saved him from fire and kills her father-in-law. He becomes president of the company, thus making Da-hee as first lady.
Ha-ryu blackmailed her for seeing a webtoon and news about Da-hee funds of money causing her husband to divorce her and facing Ha-ryu for revenge which resulted in her shooting him with her gun and rushing to hospital.
Later Da-hee was banned from the blue house and met Ha-Ryu, her stepbrother. She learns the truth about his father and tries to kill Ha-ryu but Da-hee saves his life and kills herself.
Before her death she apologizes to Ha-ryu for what she did,for her mistakes and wrongdoings and for hurting others including Doo-kyung leaving Ha-ryu's revenge competed but him being all alone after her death.
- Joo Yang Hun (stepbrother)