Kim Sum

Kim Sum is a main character in the psychological thriller series Somebody.

Character creation
Actress Kang Hae-lim referred to the character Mária in the Hungarian movie On Body and Soul in preparation for the role.

Biography
Kim Sum is a software developer who has made the social app "Somebody." She accidentally connects with a serial killer who also uses the app to find his next victims.

Autism
Sum states that she has Asperger's syndrome at the end of episode 1. It is mentioned multiple times thereafter as well.