Ok I get that Hachibi cannot be extracted by Naruto, because he's inside Killer Bee (not sure why, since Naruto has shared chakra with Killer Bee lots of times, just like he did with the other bjous with the fist bump, but whatever).
The thing is, Sukaku was actually inside Obito, he extracted it from Gaara, it makes no sense.
The thing is, Sukaku was actually inside Obito, he extracted it from Gaara, it makes no sense.