No, She is a Human.
if you are up to date with the episodes out you will have seen a full body transormation into a hollow when ichigo was overtaken and lost control whilst fighting with murama however he did push back the hollow form and turn back to normal
Renji? No, he isn't part hollow so he can't get a hollow mask.
He died in a car crash and his sprit became a Hollow.
Ichigo doesn't have his hollow mask in Shattered Blade but he does have it in Versus Crusade
you have to kill your hollow inside of your mind
So far (atleast as far as chapter 399) it hasn't been comfirmed yet. Well Aizen did say when it was revealed when some he new had a hollow mask that he is to good for a hollow mask, he goes on to say that only a weakling would need one.
Ichigo kills Ulquiorra while in Hueco Mundo, during Ulquiorra's death, He looks at Orihime and asked her if she is afraid of him, Orihime, with a saddened expression, tells him she is not afraid, and Ulquiorra reaches his hand out to her, but before she can grab it, his hand begins to dissolve into ash. He gets killed by Ichigo, who turns into a Hollow to protect Orihime.
The YouTube video channel contains several tutorials showing how to make a hollow mask from papier mache. The eHow and Instructables websites also give information on how to do this.
It's simply called a Hollow mask.
When a Hollow's mask is completely removed, their true form is revealed, which is a mindless and animalistic creature called a Menos Grande. The Menos Grande is a far more powerful and dangerous form of Hollow capable of causing significant destruction.
Orihime means Princess in english!!:)
While I don't fully understand your question, I think the answer you're looking for is a "Vizard." In Bleach, a Vizard is a shinigami who has access to their hollow's mask and power. Basically,