Mike (Novel Series)

Mike is a homeless resident of Woodbury who was mentioned by Charlie in a conversation with Brian Blake.

Pre-Apocalypse
Nothing is known about Mike's life prior to the apocalypse but it is possible that he was homeless.

After-Apocalypse
"Yellow Mike" was friends with Charlie, and the other two homeless people, while still alive. Charlie mentions that Yellow Mike was devoured by zombies.

Trivia

 * Mike is one of the few characters with a continuing nickname
 * Yellow Mike might be a reference to the swedish band Yellow Mike