User blog comment:Xilinoc/Ch. 604 - REVITALIZE/@comment-24153155-20141106205952/@comment-1771627-20141107040405

I've been thinking about that and created a theory. I think that every soul in Bleach (no matter the race) have a latent 'capability' associated to their 'core'. For humans and pluses, the core is the heart, for a shinigami it is the blade, for a hollow it is the mask. The souls would need a minimum level of 'power' so that they are able to access their capabilities,and the more power, the better they can access these capability. The capability is exclusive to one particular soul, like a personality.

Example: I'm a normal human and then somehow I gain power, becoming a Orihime-like human, with the capability to control gravity. I die, a shinigami don't come for me, and i become a weak hollow. Once I cannibalize enough hollows, I'll have sufficient power to unlock my gravity capability in a hollow-like way. If I break my mask and become an Arrancar, the core of my capability Will be transformed into my zanpakuto, and my Ressurrección Will have gravity-related abilities.

Following this line, we could conclude that Ywhach's powers are so overwhelming in the way that they can give and take away power from people who passed through some special procedure, probably that Schrift thing when quincy drink his blood (if he could take power from anyone, it would be as simple as draining all the power from the RG).

That said, the last part of this titanic text would be saying that the SternRitter abilities (The Fear, The Zombie, The Love...) are NOT given by Ywhach. He Just shares his power and allows them to access the capabilities of their hearts. Royd and Loyd always had the capability to mimic people for example, but when they gained power from Ywhach their capabilities rose more than ever and became known as The Yourself. It would explain why powers always fit on any character's personality as well.

Glad if you managed to read everything, I wanted to share and see what you guys think.