Karaoke Clerk (カフェ店員) runs the front desk of the Karaoke Club that Retsuko frequents and is a support character of the Netflix Original series Aggretsuko.
The Karaoke Clerk's appearance is based off the Mandrill. He has a muscular build with brown fur and skin, blue cheeks, and a red muzzle. He wears a white dress shirt, gray pants, brown shoes, and a green apron.
Not much is known about the Karaoke Clerk, not even his real name. He doesn't speak much other than to ask Retsuko what services she wants at the karaoke bar. He does seem to support Retsuko's love for death metal and is even seen dancing to her vocals.