Board Thread:Questions and Answers/@comment-26572409-20150704135123/@comment-25801533-20150708054951

Like Chri087v said, it does seem like White was transferred to Ichigo when he was born and thus only he would have the inner hollow. So I dont think that they would have the capacity to become soul reapers like Ichigo because the balance wouldnt be there. Ichigo is a Human Shinigami Quincy Hollow. Without the hollow Karin and Yuzu would be missing a key component in the balance of their abilities. However they still have a pure blood Quincy mother and captain level soul reaper father, so they should both have very high but latent abilities.