Ulquiorra, without any apparent communication with Ienzo on the matter, took a half step to place himself in front of him, and very firmly between him and the door.

He didn't unsheathe Murcielago, however. He could feel the power, and age, and unpleasantness of the thing they were facing, and Ulquiorra of all of them was well used to that kind of feeling from something. It was big, and old, and powerful, and likely would take a combined effort from the Arrancar to defeat, which meant that for now, Nel was right, and projectiles would get them further than swords would.

It would be waiting.