Who is the protagonist in CyberPunk 2077?

Context: Cyberpunk 2077 is a 2020 action role-playing video game developed by CD Projekt Red and published by CD Projekt. Set in Night City, an open world set in the Cyberpunk universe, players assume the role of a customisable mercenary known as V, who can acquire skills in hacking and machinery with options for melee and ranged combat. The main story follows V's struggle as they deal with a mysterious cybernetic implant that threatens to overwrite their body with the personality and memories of a deceased celebrity only perceived by V; the two must work together to be separated and save V's life.

Answer: The main story revolves around the protagonist V, as they deal with a mysterious cybernetic implant that threatens to overwrite their body with another person's memories.