The most important friendship in The Walking Dead is, of course, Rick and Daryl. It didn’t happen quickly.  They got to know each other gradually, and learned to trust each other. After Merle died, the definition of their friendship was made official in 416, “A”, when Daryl saved the lives of Rick, Michonne and Carl, and Rick tells him, “You’re my brother.”  They are brothers who are best friends, in good times and bad.