Quote Originally Posted by Zero View Post
Or, Kubo implies that he is Yoruichi's father... since there is no one else with such a dark skin tone among Shinigami beside those two and the fact that no one noticed him, might be to show the level of his stealth abilities. He might have went to see her in that case.
Well Tousen had dark skin and his powers were related to subverting senses(though you can argue that those aren't his abilities)too but he was fodder anyway.