Luffy, as we know, makes friends everywhere he goes. It's probably close to a hundred how many people he's met, fought, eaten with, made laugh and cried with.
But my question is this, excluding the crew, who do you think Luffy has gotten along with best out of all non-straw hats? Personally I think, in a world where Luffy didn't have plot weighing him down, if he had the time to just troll the seas and hang out, him and Katakuri would be BFF's.
What do you all think?