Which characters are best friends with each other?

[Ava Collier]

Originally Posted by Sage Ninja

Mikey: Klunk (I would also say Silver Sentry but that is more of a hero worship, looking up too, admiration type of thing that I wouldn't call friendship on eqaul terms with)

I think they see each other on equal terms. Certainly on more equal terms than any of the turtles compared to Master Splinter. There's a FF episode that proves just how highly Silver Sentry thinks of Michelangelo. "Clash of the Turtle Titans".