I agree with all the posts above.
Really, the only way to form an affiliate is through roleplay. It can take 5ever to find someone willing to put up with your OC's, and coordinating backstories and stuff can be tricky... But I guess it depends on the type of affiliate.
And, like Vesp said, I think you should take the time to find another character that "fits" Jumping before you rush off and look for affiliates (Eee no offence). I would reccomand finding someone to do a 1x1 RP with (hhh I'd be willing ;u;), and just let things go from there.. That's what I did, for the most part, anyways x'D
-Shuffles awkwardly away-