Bloody Flower (Korean: ๋ธ๋ฌ๋ ํ๋ผ์) is a 2026 South Korean crime-psychological thriller directed by Han Yoon-sun. It is based on the novel The Flower of Death by Lee Dong-geon.
The series premiered on Disney+ on February 4, 2026, and it centers on a shocking moral and legal conflict: a serial killer claims his murders were โhuman experimentsโ that created a universal medical cure.
Below is a complete, accurate guide to the Bloody Flower cast, including the main and supporting characters and what drives them.
Bloody Flower Cast (Quick List)
Main Cast
- Ryeounย asย Lee Woo-gyeom
- Sung Dong-ilย asย Park Han-joon
- Keum Sae-rokย asย Cha Yi-yeon
Supporting Cast
- Yoon Chae-naย asย Park Min-seo
- Shin Seung-hwanย asย Cho U-cheol
- Ko Kyu-pilย asย Kong Min-cheol
- Jung So-riย asย Yun Min-gyeong
- Ri Woo-jinย asย Oh Hyun-deuk
- Kwon Soo-hyunย asย Chae Jeong-su
Main Cast and Characters (Deep Details)
1) Ryeoun as Lee Woo-gyeom
Who he is:
Lee Woo-gyeom is a former medical student and genius who becomes a notorious serial killer. He admits to killing 17 people.
What makes him different (and terrifying):
Woo-gyeom claims the murders were not random. He calls them illegal human experiments. He believes they led to a โmiracle drugโ made from his blood, and he says it can cure terminal illnesses.
His mindset and motivation:
- He spentย three years in a coma.
- Heย lost his mother.
- After that, he chose a darker path to reach what he believes is a scientific breakthrough.
- In court, he staysย calm and controlled, and he uses his medical knowledge toย increase his chances of survival.
- He treats the people he killed as a โnecessary priceโ for saving humanity.
About the actor (Ryeoun):
Ryeoun is known for roles in Weak Hero Class 2, Twinkling Watermelon, and 18 Again.
2) Sung Dong-il as Park Han-joon
Who he is:
Park Han-joon is a veteran defense attorney who takes Lee Woo-gyeomโs caseโan almost impossible choice for any lawyer with a public reputation.
What drives him:
Han-joon was once a principled lawyer. But personal tragedy made him cynical and money-driven.
The biggest reason he defends Woo-gyeom is his daughter:
- His daughterย Min-seoย hasย Batten disease, a rare and fatal illness.
- Han-joon becomes desperate and believes Woo-gyeomโs โcureโ might be theย only way to save her.
His core conflict:
He is defending a mass murderer not because he agrees with him, but because he is a father trying to keep his child alive. This creates a painful ethical question:
How far can a parent go before love becomes something darker?
About the actor (Sung Dong-il):
Sung Dong-il is known for the Reply series, Metamorphosis, and Project Wolf Hunting.
3) Keum Sae-rok as Cha Yi-yeon
Who she is:
Cha Yi-yeon is a fierce prosecutor determined to secure the death penalty for Lee Woo-gyeom.
Her background:
She is the youngest daughter of the powerful Sejin Group, but she refuses to use that influence. She relies on legal evidence and her own ability.
Her motivation and mission:
- Yi-yeon sees Woo-gyeom as a manipulative monster.
- She refuses to believe his โmiracle cureโ story.
- She focuses on finding the bodies of the remaining victims so Woo-gyeom cannot use them as bargaining tools in court.
About the actor (Keum Sae-rok):
Keum Sae-rok is known for The Interest of Love, Youth of May, and The Fiery Priest.
Supporting Cast and Roles
Yoon Chae-na as Park Min-seo
- Park Han-joonโs daughter.
- Her terminal illness is the main reason her fatherโs morals begin to collapse.
Shin Seung-hwan as Cho U-cheol
- A relentless reporter covering the Woo-gyeom case.
- Often clashes with both legal teams to get the most shocking headlines.
Ko Kyu-pil as Kong Min-cheol
- A detective connected to the early investigation of disappearances inย Guam City.
Jung So-ri as Yun Min-gyeong
- A key figure who supports the legal or investigative process (connected to the prosecution or defense side).
Ri Woo-jin as Oh Hyun-deuk
- A senior prosecutor overseeing Yi-yeonโs work.
- Handles political pressure around this high-profile case.
Kwon Soo-hyun as Chae Jeong-su
- Connected to the medical or legal side of the case.
- Often appears in flashbacks or as a witness.
Production Credits (Official Details)
- Director:ย Han Yoon-sun
- Screenwriter:ย Ko Jun-seok
- Based on:ย The Flower of Deathย (์ฃฝ์์ ๊ฝ) by Lee Dong-geon
- Platforms/Network:ย Disney+ / Hulu / Viu
- Premiere date:ย February 4, 2026ย (Disney+)
What the Cast Represents: Key Themes in Bloody Flower
The main cast is built around one big question:
Is the life of a murderer worth more if he can save thousands?
Each lead character represents a different answer:
- Ryeoun (Lee Woo-gyeom):ย the cold logic of science without human limits.
- Sung Dong-il (Park Han-joon):ย a fatherโs love that becomes morally dangerous.
- Keum Sae-rok (Cha Yi-yeon):ย justice that refuses to bend, even for a possible miracle.
This is why the cast matters so much in Bloody Flower. The story is not only about crimeโit is about what people are willing to excuse when hope is on the table.
FAQ: Bloody Flower Cast
Q1) Who is the main lead in Bloody Flower?
The main cast includes Ryeoun, Sung Dong-il, and Keum Sae-rok.
Q2) Who plays the serial killer in Bloody Flower?
Ryeoun plays Lee Woo-gyeom, a former medical student who admits to killing 17 people.
Q3) Who is the prosecutor in Bloody Flower?
Keum Sae-rok plays Cha Yi-yeon, the prosecutor seeking the death penalty.
Q4) Who is the defense lawyer in Bloody Flower?
Sung Dong-il plays Park Han-joon, the defense attorney who takes Woo-gyeomโs case.
Q5) Where did Bloody Flower premiere?
It premiered on Disney+ on February 4, 2026 (and is listed for Disney+ / Hulu / Viu).
