Guardian: The Lonely and Great God

Cinematography

• 
  Park Seong Yong
• 
  Kang Yun Sun

Composer

• 
  Nam Hye Seung

Director

• 
  Lee Eung Bok

Producer

• 
  Yun Ha Rim

Screenwriter

• 
  Kim Eun Sook

Main Role

• 
  Gong Yoo

  Kim Sin

  Main Role
• 
  Kim Go Eun

  Ji Eun Tak

  Main Role
• 
  Lee Dong Wook

  Grim Reaper

  Main Role
• 
  Yoo In Na

  Sunny

  Main Role
• 
  Yook Sung Jae

  Yoo Deok Hwa

  Main Role

Support Role

• 
  Lee El

  [Samsin Lady]

  Support Role
• 
  Kim Sung Kyum

  Yoo Sin U [Deok Hwa's grandfather]

  Support Role
• 
  Kim Byung Chul

  Park Jeong Hun [Goryeo eunuch]

  Support Role
• 
  Jo Woo Jin

  Kim Do Young [Yoo Shin Woo's secretary]

  Support Role
• 
  Yeom Hye Ran

  Ji Yun Suk [Eun Tak's aunt]

  Support Role
• 
  Jung Young Ki

  Park Gyeong Sik [Eun Tak's cousin]

  Support Role
• 
  Choi Ri

  Park Gyeong Mi [Eun Tak's cousin]

  Support Role
• 
  Choi Woong

  [Grim reaper's junior]

  Support Role
• 
  Jo Hyun Sik

  [Batch 21 grim reaper]

  Support Role
• 
  Kim Ki Doo

  [Grim reaper]

  Support Role
• 
  Kim Chang Hwan

  [Batch 23 grim reaper]

  Support Role
• 
  Yoon Da Young

  [Batch 23 grim reaper] / [Court lady]

  Support Role
• 
  Go Bo Gyeol

  Kim Yu Na [Eun Tak's class president]

  Support Role
• 
  Park Kyung Hye

  [Virgin ghost]

  Support Role
• 
  Kim Min Young

  Park Su Jin [Eun Tak's class bully]

  Support Role
• 
  Han Seo Jin

  Ji Eun Tak [Young]

  Support Role
• 
  Jung Ji Hoon

  Yoo Deok Hwa [Young] / Yoo Geum Sun [Kim Shin's servant]

  Support Role
• 
  Kim Seo Jung

  [Sunny's friend]

  Support Role
• 
  Kim Baek Ri

  Hwang Mi Yeong

  Support Role
• 
  Kim Nan Hee

  [Eun Tak's teacher]

  Support Role
• 
  Byun Joo Hyun Support Role

Guest Role

• 
  Kim Hyeon Bin

  Yoo Deok Hwa [Teen] (Ep. 1)

  Guest Role
• 
  Park Hee Von

  Ji Yeon Hui [Eun Tak's mother] (Ep. 1)

  Guest Role
• 
  Lee Moon Soo

  [Sin's loyal old man in Goryeo era / Geum Sun's grandfather] (Ep. 1)

  Guest Role
• 
  Kim Sung Bum

  [Driver] (Ep. 1)

  Guest Role
• 
  Sung Nak Kyung

  Na Gyeong Won [Hit Eun Tak's mother by car] (Ep. 1-2)

  Guest Role
• 
  Kim Min Jae

  Wang Yeo [Goryeo’s king] (Ep. 1, 7-13)

  Guest Role
• 
  Kim So Hyun

  Kim Seon [Goryeo’s queen / Shin's sister] (Ep. 1, 7, 9-11, 13)

  Guest Role
• 
  Yoon Kyung Ho

  Kim U Sik [Kim Sin's lieutenant in Goryeo era] (Ep. 1, 12, 14)

  Guest Role
• 
  Nam Da Reum

  [Boy in Paris] (Ep. 1, 4)

  Guest Role
• 
  Hong Ki Joon

  (Ep. 1)

  Guest Role
• 
  Go Soo Jung

  [Ghost] (Ep. 2)

  Guest Role
• 
  Lee Han Seo

  [Girl in bookstore] (Ep. 2)

  Guest Role
• 
  Park Jin U

  [Money lender] (Ep. 2-3, 6)

  Guest Role
• 
  Yoon Joo Man

  [Money lender] (Ep. 2-3, 6)

  Guest Role
• 
  Hwang Seok Jeong

  [Fortune teller ghost] (Ep. 2-4, 6, 9)

  Guest Role
• 
  Park Se Wan

  Ko Si Won [Ghost with glasses] (Ep. 2, 4-5)

  Guest Role
• 
  Yoon Boo Jin

  [Landlady] (Ep. 3)

  Guest Role
• 
  Ahn Doo Ho

  [Café man] (Ep. 3)

  Guest Role
• 
  Kim Nam Hee

  [Doctor in ER] (Ep. 3)

  Guest Role
• 
  Lee Seul Bi

  [Vain woman at cafe] (Ep. 3)

  Guest Role
• 
  Kang Jung Goo

  [Doctor] (Ep. 3, 9)

  Guest Role
• 
  Carson Allen

  [Girl at restaurant] (Ep. 4)

  Guest Role
• 
  Kim So Ra

  Lee Jeong Hwa [Vengeful ghost] (Ep. 4, 6-7, 9, 11)

  Guest Role
• 
  Hwang In Jun

  [Detective] (Ep. 4, 6-7)

  Guest Role
• 
  Hong Boo Hyang

  [Si Won's mother] (Ep. 5)

  Guest Role
• 
  Joey Albright

  Waiter Ryan (Ep. 5, 15)

  Guest Role
• 
  Oh Ah Rin

  [Girl at hospital] (Ep. 6)

  Guest Role
• 
  Lee Dong Yong

  [Convenience store owner] (Ep. 6)

  Guest Role
• 
  Jo Yong Jin

  Choi Tae Hui [Child] (Ep. 7)

  Guest Role
• 
  Jung Hae In

  Choi Tae Hui [Eun Tak's childhood friend] (Ep. 7-8)

  Guest Role
• 
  Hwang Sang Kyung

  [Bicycle pickpocket] (Ep. 7-8, 10)

  Guest Role
• 
  Kim Min Seo

  Jun Yeong (Ep. 8)

  Guest Role
• 
  Shin Young Kyu

  [Bus passenger] (Ep. 8)

  Guest Role
• 
  Kim Hyun Mok

  [Bus passenger] (Ep. 8)

  Guest Role
• 
  Jeon Yeo Jin

  [Mom bus passenger] (Ep. 8)

  Guest Role
• 
  Park Min Young

  [Jun Yeong's mother] (Ep. 8)

  Guest Role
• 
  Ahn Ji Hyun

  Ko Jeong Hyeon [Eun Tak's schoolgirl ghost friend] (Ep. 8, 10)

  Guest Role
• 
  Lee Yoon Sang

  [Doctor] (Ep. 9)

  Guest Role
• 
  Noh Yi Han

  [Palm blast boy] (Ep. 9, 12-13, 15)

  Guest Role
• 
  Kim Ki Nam

  (Ep. 9)

  Guest Role
• 
  Lee Tae Hyung

  [Nobleman] (Ep. 10)

  Guest Role
• 
  Ha Min

  [Kim Seon's court lady] (Ep. 10-11, 13)

  Guest Role
• 
  Lee Chae Kyung

  Jang Il Ok [Manager] (Ep. 10, 12-13)

  Guest Role
• 
  Lee Kyu Hyung

  [Jeong Hwa's husband] (Ep. 11)

  Guest Role
• 
  Kim Do Hyun

  [Internal audit team grim reaper] (Ep. 13)

  Guest Role
• 
  Ryu Tae Ho

  [Eun Tak's boss] (Ep. 14)

  Guest Role
• 
  Kang Hye Kyung

  [Hotel receptionist] (Ep. 14)

  Guest Role
• 
  Lee Seung Joon

  [Sin - Voice special] (Ep. 14)

  Guest Role
• 
  Lee Hyo Bin

  Lee Su Ji [BBQ olive chicken café staff] (Ep. 14-15)

  Guest Role
• 
  Yang Jo Ah

  [Eun Tak's colleague] (Ep. 14-16)

  Guest Role
• 
  Choi Na Moo

  [Eun Tak's colleague] (Ep. 14-16)

  Guest Role
• 
  Kim Geum Soon

  [Middle-age female ghost] (Ep. 14, 16)

  Guest Role
• 
  Son Yeong Soon

  [Widowed lady] (Ep. 15)

  Guest Role
• 
  Kim Hye Yoon

  [Widowed lady] (Ep. 15)

  Guest Role
• 
  Ham Sung Min

  [North Korean soldier] (Ep. 15)

  Guest Role
• 
  Joo Boo Jin

  [Motel owner] (Ep. 16)

  Guest Role
• 
  Park Yong

  [Do Yeong's driver] (Ep. 16)

  Guest Role
• 
  Song Soo Hyun

  [U Sik's daughter] (Ep. 16)

  Guest Role
• 
  Choi Bum Ho

  (Ep. 16)

  Guest Role
• 
  Park Ki Ryung

  (Ep. 16)

  Guest Role
• 
  Oh Yoo Mi

  [Nurse]

  Guest Role
• 
  Park Jin Soo

  [Friend]

  Guest Role
• 
  Lee Woon San

  [Emperor]

  Guest Role
• 
  Lee Won Jin

  [Hypnotist]

  Guest Role
• 
  Ma Min Hee

  [Su Jin's group]

  Guest Role
• 
  Kim Nan Hwi

  [Eun Tak's homeroom teacher]

  Guest Role

Unknown

• 
  Kim Joo Hwang Unknown
• 
  Dong Yoon Seok Unknown
• 
  Lee Joo Young Unknown
• 
  Son Ji Na Unknown
• 
  Han Sang Gil Unknown
• 
  Kwon Oh Kyung Unknown
• 
  Kim Woo Jin Unknown
• 
  Lee Jae Yi Unknown
• 
  Noh Kang Min Unknown
• 
  Jung Da Woon Unknown
• 
  Kim Ian Unknown
• 
  Jung In Young Unknown
• 
  Lee Seung Joo Unknown