^I agree, Linebeck was a lot of fun
My favorite would have to be Midna. She makes things very interesting! My second favorite would be KoRL. He gave me information I needed, but wasn't annoying. He actually was helpful, him being the boat you use and his story was interesting.
Ciela was surprisingly fun, despite being from
PH. She was probably my favorite fairy companion.
Tatl wasn't too bad, and neither was Navi. I don't really have an opinion of Ezlo.
Oh, and if she counts, Tetra beats Midna in my book. But I don't think she would qualify as a sidekick/companion.
Fi just irritated me.