User blog comment:Cococrash11/Hollows breeds with humans/@comment-1932702-20100503100150

How DO we know that Isshin even DID pull it off?? I'm pretty sure Masaki was just an ordinary human whose special power was to cheer little Ichigo up. For example, if Masaki was an Arrancar, surely she would have been able to sense Grand Fisher or at least not die from an attack like that?

From the manga screw up, if we put two and two together, we get "You (Ichigo) are the son of a Shinigami and a Human" or vice versa. Kubo, through Aizen, says Masaki is a human. Period.

This is regarding the Kurosaki family. In reference to the "Can Hollows Reproduce" part of it, I've always wondered how Szayel Aporro and Yyldtford (Aaarghh, spelling) were Brothers. That was the only reference to show that Hollows can have relations. Of course, they could have been like two Hollows born from the same soul (twins, anybody?).

Okay, I'm going to contradict what I just said but who cares. Hollows (not Menos, just normal ones) are basically souls which had something to accomplish in the living world but lost their mind to it (like the modern theory of ghosts). So you could call them incomplete in a sense, or perhaps impure. Shinigami "purify" them with Zanpakuto and depending on their, karma, shall we say, the Hollows go to either Soul Society or Hell.

So, Hollows are nothing but souls which don't have a mind. I'm pretty sure SOULS can't reproduce unless they inhabit a physical body. I know Hollows aren't intangible or something but in their case, the soul could have a taken a material form just to exist. And thus, the evolution of Hollows into Menos and so on continues. But they still don't have a physical body, so they cannot reproduce. I don't know about Arrancar, though (the Ulquiorra type ones, not Iceringer). They basically undergo Shinigamification, so the implications are vague.