Despite not really enjoying Wu’s company, Mako still doesn’t want to hurt his feelings.
Wu is considerate of Mako’s problems. He treats him to a smoothie to cheer him up and planned on buying Mako some new suits.
Wu admits he’s not cut out to be king.
Mako has warmed up a bit to Wu.
Wu loves being carried by Mako.
I nominate Wu as Mako’s best guy friend outside of the family.
I’m hoping they do become actual friends. The juxtaposition would be great, just as it is in Korra and Asami’s friendship.
This started as a crack ship and has turned into a really sweet friendship somehow. That Wu has an unrequited crush on Mako seems to almost certainly be canon (though it’s all innuendo because Nickelodeon), but rather than becoming a joke, it’s the thing that makes Wu open to Mako’s criticism, placing him on the path to becoming a better person.