Disclaimer: I don't own Bleach or Inuyasha.
~~Morderura~~
Once a Hollow was consumed by another Hollow, the wound wouldn't heal and it would scar, giving the sign that the Hollow wouldn't evolve anymore. Kanna assumed it was because of the reiatsu in the Hollow's bite. The open wound be surrounded by the reiatsu of the eater, where it would then proceed to scar the wound permanently while the foreign reiatsu destroys the component needed for evolving inside Hollows.
In easier terms, it would be like destroying the cells or organs needed to grow and evolve, but the victim wouldn't feel pain if the wound was sealed; instead, they wouldn't evolve anymore and they would be forever stuck in that Etapa.
Those that don't evolve into the final Etapa, the Vasto Lorde, are quickly killed because Hueco Mundo doesn't take kindly to weaklings. Sooner or later, those weaklings would be devoured unless they had abilities to survive or under the leadership of a pack.
Basically, it was a rule within Hueco Mundo to not let yourself be bitten or it's over.
If Kanna was bitten, it wouldn't matter if she didn't need to eat to consume to survive and grow and stay afloat, the 'cells' inside her would be destroyed and she would forever be frozen in that stage; Kanna didn't really care of those matters but she'd rather still be complete, or as complete as she could be.
Nevertheless, Kanna hadn't ever imagine that she would be following one of the top of the food chain without being slaughtered.
Faintly, she also wondered if the bat Vasto Lorde was exactly like her.
And Kanna wondered if being a Vasto Lorde would cease the Emptiness in her chest.
But according to the eyes of this bat Vasto Lorde, most likely not; so Kanna had no hurries to evolve into a Vasto Lorde because it wouldn't change what she wanted.
Death was truly a despicable being. Turning Kanna, who only existed in the living realm for 1 year or so, into an incomplete monster hunted by those foolish Shinigami, condemning her to a world of cannibals and monsters out to get her.
Kanna supposed she should feel angry or sad.
Yet she felt nothing.
She was okay with this as she followed the bat Vasto Lorde.
