An angel symboling the tiger, who protects the world with absolute power and is the leader of the 12 angels. He buries the four angels symbolizing the cow, rabbit, sheep, and chicken who were sacrificed in a past battle deep in his heart, and lives in the human world while hiding his identity.
The only human with special abilities chosen by God and the manager of the 12 angels. He stays by the side of the angels and helps them protect human world.
An angel symbolizing the snake. She is a doctor of oriental medicine who treats all diseases of humans with medical techniques passed down from ancient times.
Production
Development
Koo Sung-mok, who worked with Ma Dong-seok in the films Pained (2011) and The Neighbors (2012), would be in charge of the production, and Twelve was prepared with the goal of airing at the end of next year.[2]
Contents, Big Punch Pictures, Nova Film, and Studio X+U would managed the production with the latter also took the planning.[3] While The Contents On would co-produced the series.[4]
Casting
In 2023, Ma Dong-seok was reportedly received the series' script and positively reviewing it.[2]
^ abHa, Soo-jung (August 25, 2023). [단독] '천만배우' 마동석, 한반도 지키는 히어로된다..차기작은 '트웰브' [[Exclusive] 'Ten Million Actor' Ma Dong-seok Becomes a Hero Protecting the Korean Peninsula...Next Project is 'Twelve'] (in Korean). Osen. Archived from the original on September 5, 2024. Retrieved November 3, 2024 – via Naver.
^ abcYoo, Ji-hee (October 24, 2024). [단독] 마동석‧박형식‧서인국→안지혜...12지신 히어로물 ‘트웰브’, 막강 라인업 [종합] [[Exclusive] Ma Dong-seok‧Park Hyung-sik‧Seo In-guk → Ahn Ji-hye...12 zodiac hero movie 'Twelve', powerful lineup [Comprehensive]] (in Korean). Ilgan Sports. Retrieved November 3, 2024 – via Naver.
^Kim, Kyung-hee (October 31, 2024). 마동석 新유니버스'트웰브' 박형식, 서인국, 성동일, 이주빈, 고규필 등 라인업 완성 [Ma Dong-seok's New Universe 'Twelve' Completes Lineup with Park Hyung-sik, Seo In-guk, Sung Dong-il, Lee Joo-bin, and Ko Kyu-pil] (in Korean). iMBC. Retrieved November 3, 2024 – via Naver.
^Ha, Soo-jung (April 9, 2024). [단독] '차기작 4편' 지창욱, 생애 첫 슈퍼히어로 될까 "'트웰브' 검토"(종합) [[Exclusive] Ji Chang-wook in 'Next 4', Will He Become His First Superhero? "Considering 'Twelve'" (Comprehensive)] (in Korean). Osen. Archived from the original on September 14, 2024. Retrieved November 3, 2024 – via Naver.
^Yoo, Ji-hee (September 5, 2024). [단독] 서인국, 히어로된다...마동석‧지창욱 ‘트웰브’ 합류 [[Exclusive] Seo In-guk becomes a hero... Ma Dong-seok and Ji Chang-wook join 'Twelve'] (in Korean). Ilgan Sports. Archived from the original on September 5, 2024. Retrieved November 3, 2024 – via Naver.
^Kim, Ye-eun (September 7, 2024). [단독] 이주빈, 또 마동석 만난다...히어로물 '트웰브' 합류 [[Exclusive] Lee Joo-bin meets Ma Dong-seok again...Joins the hero movie 'Twelve'] (in Korean). Xports News. Archived from the original on September 7, 2024. Retrieved November 3, 2024 – via Naver.
^Jang, Woo-young (October 2, 2024). [단독] 강미나, 마동석→서인국 만난다..히어로물 '트웰브' 합류 [[Exclusive] Kang Mina, Ma Dong-seok → Seo In-guk meet.. Joining the hero movie 'Twelve'] (in Korean). Osen. Retrieved November 3, 2024 – via Naver.
^Choi, Yoon-na (October 14, 2024). [단독] 성동일·고규필, 마동석→서인국 ‘트웰브’ 합류 [[Exclusive] Sung Dong-il and Go Kyu-pil join Ma Dong-seok → Seo In-guk's 'Twelve'] (in Korean). Sports Dong-a. Retrieved November 3, 2024 – via Naver.
^Ha, Soo-jung (October 31, 2024). 히어로 마동석→악귀 박형식, '트웰브' 10人 캐스팅 확정 [공식] [Hero Ma Dong-seok → Demon Park Hyung-sik, 'Twelve' 10-person cast confirmed [Official]] (in Korean). Osen. Retrieved November 3, 2024 – via Naver.
