Hitsugaya raised an eyebrow slightly, his curiosity once again piqued, but he wasn't going to push the issue. He could look at the man's spirit threads, but explaining why he suddenly got a bloody nose and felt dizzy would be difficult without insulting Angel. So for the moment he'd let it drop.

"It's hard to say," he replied. "For us to do our work on earth, we inhabit gigai...fake bodies. My guess is that this is a gigai binding us to this place, as most of the others here--at least those I've checked--are still alive."