Bae Doona

as Alpha Five

as Self - Interviewee

as Narrator

as Ok Taek-seon

as Han Young-su (7 episodes)

as Self (1 episode)

as Nemesis

as Nemesis

as Self (2 episodes)

as Self (9 episodes)

as Self (1 episode)

as Yoo-jin

as Su-jin

as Song Ji-an (8 episodes)

as Self - Narrator (1 episode)

as Self (4 episodes)

as Self (1 episode)

as Self (2 episodes)

as Soo

as Self (1 episode)

as Doo-na (1 episode)

as Seo-bi (12 episodes)

as Kim Jeong-ah

as Kang Whee-Roo (32 episodes)

as Self (1 episode)