Feeling the need to support Kubo Tite, I went out and bought Bleach Vol. 1. It's so good. If anything, the storyline was tighter then than it is now.
Anyway, I've had the niggling feeling that Ulquiorra is much more than he seems. He's badass and cool and will probably surprise us with us. He's definitely not flamboyantly weird as the other arrancar and he's certainly deeper than the others.
To the point: I think he's Orihime's brother, Kakei.
Actually, I just want him to be Orihime's brother. He has the same hair. And after his fight with Ichigo, Kakei took his mask off--so he was already half-way arrancar.
Here's why he's definitely not: Kakei was purified and he wouldn't take his sister to Hueco Mundo. No way. Or maybe he had not choice...
Kakei should join the party. He really needs to in order to make the story go full circle to volume 1.
End of Geekage.