Seo In-Guk

Choi Yi-jae

Park So-dam

Death

Go Yoon-Jung

Jung Ji-soo

Lee Jae-wook

Choi Yi-jae (I Jae's 5th reincarnation), Choi Yi-jae (Reincarnation)

Si Won Choi

Choi Yi-jae (Reincarnation), Choi Yi-jae (I Jae's 1st reincarnation)

Sung Hoon

Song Jae-seop (Yi-jae's 2nd reincarnation)

Seung-jo Jang

Lee Joo-hoon

Kim Mi-Kyung

Choi Yi-jae's mother

Kim Jae-Wook

Jeong Gyoo-cheol

Ji Hoon Kim

Park Tae Woo

Lee Do-Hyun

Choi Yi Jae [I Jae's 6th reincarnation], Jang Geon Woo

Kang-Hoon Kim

Kwon Hyuk-soo, Choi Yi-jae (Reincarnation)

Yoo In-soo

Lee Jin Sang (Hyeok Su's classmate), Choi Yi-jae (Reincarnation)

Kim Mi-ji

Social worker

Oh Jung-se

Choi Yi-jae (Reincarnation)

Bae Gang-hee

Kim Eun Jae

Jo Seung-yeon

Hyuk-soo's mother

Jung Dong-geun

Fixer