스트레스 제로

Yoo Dong-kyun

Dr. Ko (voice) / Junsu Han (voice)

Kim Seung-tae

Ta-jo (voice) / Chief Secretary (voice)

전숙경

Han Sook-hee (voice) / Jang Young-min (voice)

Im Chae-Heon

Jjang-dol (voice)

Kim Sara

Hong Jin-yi (voice)

Kim Young-jin-III

Heejang Jeon (voice) / General (voice)