Teardrop and Needle were shown to be good friends throughout the series. They are possibly friends only because Teardrop can't talk, meaning that she has never called Needle "Needy".
Episodes suggesting a friendship
In "The Glistening", Needle tells Teardrop to help her vote out Firey, so Teardrop votes for him.
In "Return of the Hang Glider", when Needle votes for Firey to win, most of the contestants slap her, but Teardrop does not.
In "Get to the Top in 500 Steps", Needle, Teardrop, and Pin are sitting with each other. When Needle unexpectedly becomes CGI, Teardrop appears concerned.