The Great Flood cast features Kim Da-Mi, Park Hae-Soo and Kwon Eun-Sung. This info article contains minor spoilers and character details for Byung-woo Kim’s 2025 Netflix movie. Check out more cast guides in Vague Visages’ Know the Cast category.

The Great Flood takes places in Seoul, Korea. As a flood consumes the city and entire world, a scientist looks after a young boy. The narrative follows the main protagonist as she experiences an epiphany about her existence and purpose. Here’s every actor and character in The Great Flood.

Read More at VV — Know the Cast: ‘Brick’

The Great Flood Cast: Kim Da-Mi as Koo An-Na

Character Profile: A widow and doctor. She is the manager of the Emotion Engine Development team. An-na learns that she must use her skills to create a new mankind.

Kim’s Resume: Koo Ja Yoon in The Witch: Part 1 — The Subversion (2018), Jo Yi Seo in Itaewon Class (2020), Gook Yeon-soo in Our Beloved Summer (2021-22), Ahn Mi-so in Soulmate (2023), Ko Yeong-Rye in A Hundred Memories (2025)

Read More at VV — Know the Cast: ‘The Electric State’

The Great Flood Cast: Park Hae-Soo as Hee-Jo

Character Profile: A member of the Darwin Center’s personal security team. He gets assigned to rescue An-na. Hee-jo was abandoned by his mother as a child.

Park’s Resume: Yi Ji Ran in Yungnyong-i Nareusya (2015-16), Hong Dong Pyo in Legend of the Blue Sea (2016-17), Kim Je Hyuk in Prison Playbook (2017-18), Lee Chan-woo in By Quantum Physics: A Nightlife Venture (2019), Cho Sang-woo in Squid Game (2021-24)

Read More at VV — Know the Cast: ‘Troll 2’

The Great Flood Cast: Kwon Eun-Sung as Ja-In

Character Profile: An-na’s “son.” He is actually an AI creation. Ja-in’s drawings help An-na solve a mystery.

Kwon’s Resume: Scooter Kid in A Man of Reason (2022), Kim Jung Do’s 2nd son in Hunt (2022), Oh Yoo Young [Jae Seok’s son] in Ransomed (2023), Mozasu in Pachinko (2024), Lee Gil-yeong in Omniscient Reader: The Prophecy (2025)

Read More at VV — Know the Cast: ‘Relay’

The Great Flood cast also includes:

• Yuna as Lee Ji Su
• Kim Min-Gwi as Mi Jeong (Looter)
• Jeon Hye-jin as Im Hyeon Mo (An Na’s superior)
• Park Byeong-eun as Lee Hwi So
• Lee Hak-joo as Sin Ga Won
• Erin Choi as Lee Ji Su (Voice)

Q.V. Hough (@QVHough) is Vague Visages’ founding editor.