| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Kim Eun-sook | Crew | Writing | Writer, Creator | 16 |
 Ailee | Crew | Sound | Vocals | 16 |
 Chanyeol | Crew | Sound | Vocals | 16 |
 Roy Kim | Crew | Sound | Vocals | 16 |
 Soyou | Crew | Sound | Vocals | 16 |
 Kwon Hyuk-chan | Crew | Directing | Director | 16 |
 Lee Eung-bok | Crew | Directing | Director, Creator | 16 |
 Lasse Lindh | Crew | Sound | Vocals | 16 |
 Heize | Crew | Sound | Vocals | 16 |
Yoon Ha-lim | Crew | Production | Executive Producer | 16 |
 Kwon Jeong-yeol | Crew | Sound | Vocals | 16 |
 Jung Joon-il | Crew | Sound | Vocals | 16 |
 Nam Hye-seung | Crew | Sound | Original Music Composer | 16 |
Kim Seon-wung | Crew | Crew | Stunts | 16 |
 Yoon Jong-ho | Crew | Directing | Director | 16 |
Kim So-yeon | Crew | Art | Production Design | 16 |
 Eddy Kim | Crew | Sound | Vocals | 16 |
 Sam Kim | Crew | Sound | Vocals | 16 |
 Kim Byung-chul | Cast | Actor | Park Joong Heon | 5 |
 Lee Dong-wook | Cast | Actor | Grim Reaper | 16 |
 Gong Yoo | Cast | Actor | Kim Shin | 16 |
 Park Hee-von | Cast | Actress | Ji Eun-tak's mother | 1 |
 Yoo In-na | Cast | Actress | Sunny | 16 |
 Yoon Kyung-ho | Cast | Actor | Kim Woo-sik | 16 |
 Kim So-hyun | Cast | Actress | Kim Sun | 7 |
 Ryu Tae-ho | Cast | Actor | Eun-Tak's boss | 1 |
 Kim Go-eun | Cast | Actress | Ji Eun-tak | 16 |
 Lee El | Cast | Actress | Samshin | 16 |
 Jo Woo-jin | Cast | Actor | Secretary Kim | 16 |
 Choi Woong | Cast | Actor | Junior Grim Reaper | 9 |
 Jung Hae-in | Cast | Actor | Tae-Hee | 2 |
 Kim Min-jae | Cast | Actor | King | 8 |
 Yook Sung-jae | Cast | Actor | Yoo Deok-hwa | 16 |
 Park Se-wan | Cast | Actress | Ghost with glasses | 3 |
 Yoon Da-young | Cast | Actress | Female Grim Reaper | 7 |
 Kim Seong-gyeom | Cast | Actor | Yu Sin-woo | 16 |
 Yeom Hye-ran | Cast | Actress | Ji Yun-Sook | 16 |
 Go Bo-gyeol | Cast | Actress | Kim Yoo-na | 7 |
 Park Kyung-hye | Cast | Actress | ghost trying to take Eun-tak with her | 12 |
 Ahn Ji-hyun | Cast | Actress | Ko Hyun-Jung (ghost at library) | 3 |
 Jo Hyun-sik | Cast | Actor | Loan shark | 4 |
 Carson Allen | Cast | Actress | Girl at restaurant | 1 |
 Kang Hye-kyung | Cast | Actress | Hotel receptionist | 1 |
 Ha-min | Cast | Actress | [Kim Sun's court lady] | 3 |
 Kim Baek-ri | Cast | Actress | Hwang Mi-young | 16 |
 Kim Woo Jin | Cast | Actor | 16 | |
| Person | Type | Job | Role(s) | Episodes |
