His family includes his wife, Kinoshita Keiko, and their son, Kinoshita Keita, who is around 10 years old and attends elementary school. The decision to rent their space results in Norayama Kuroyoshi and his grandson Norakuro moving in to establish a detective agency. Keita later becomes employed by this agency.

Keisuke Kinoshita wears glasses and possesses no notable special physical characteristics, freckles, facial hair, or smoking habit. His background centers on navigating everyday challenges as a working-class parent and provider.