Tomiko

Uhm...Original...^.^

This is waaaay before the events of the actual manga/show

Ok...the Quincy cross is because she's a Quincy, but doesn't know it. The Death Gods take her in, and everyone isn't allowed to mention "Quincy" with her around.

Also, Ichimaru Gin, Captain of the 3rd Division favors her, and when she is out of "Death God School", he takes her under his wing, and she is indeed in his division.

And, actually, her Death God robes are as they are here, grey, with white sashed tied around her shoulders.
I think I'm done now.