Board Thread:Naruto Discussions/@comment-4688597-20140915235713/@comment-24808887-20140916130639

JOA20 wrote: Rin was made to be Isobu's jinchūriki. Killer B wasn't chosen (apparently) to become Gyūki's jinchūriki because he was Fukai's relative (it was A, and B is just the adoptive brother). We can say whatever we want, but for now we know little to nothing about requirements to become a jinchūriki. And because of that she jumped on Kakashi`s raikiri(Her being uncompatible and 3tails going to rampage was matter of time). Killer B was chosen of compatible children(he vas chosen becuase of being able to use Lariat in AB combi and was adopted for sole reason jinchūriki being kages relative)