Full cast of Twelve

Don Lee

Tae-san

8 episodes

Park Hyung-sik

Ogwi

8 episodes

Seo In-guk

Won-seung

8 episodes

Lee Ju-bin

Mir

8 episodes

Ko Kyu-pil

Do-ni

8 episodes

Kang Mi-na

Kang-ji

8 episodes

Sung Yoo-bin

Jui-dol

8 episodes

Ahn Ji-hye

Mal-sook

8 episodes

Regina Lei

Bang-wool

8 episodes

Sung Dong-il

Ma-rok

8 episodes

Kim Chan-hyung

Sa-min

8 episodes

Ye Su-jeong

Geum-soon

6 episodes

Son Jong-hak

Man-bok

4 episodes

Na In-woo

Ha-nu

3 episodes

Han Ye-ji

Yang-mi

3 episodes

Bae Yu-ram

Mr. To

3 episodes

Han Jae-in

Dal-gi

3 episodes

Noh Eun-ha

Geum-soon's Mother

2 episodes

Shin Seung-hwan

Jo Yang-su

1 episode

Kim Jeong-hwan

Kim Seong-hwan

1 episode

Kim Byung-cheol

Gambling Den Boss

1 episode

Lee Sang-won

Bar Customer

1 episode

Jo Yong-geun

Bar Customer

1 episode

Jo Yong-jun

Villager

1 episode

Seo Mun-ho

Villager

1 episode

Ahn Seok-hyun

Hae-tae (child)

1 episode

Jang Jae-ho

Hae-tae

1 episode