Substitute Shinigami? They had those? And who the hell was Ichigo.

"I've never met anyone named Ichigo. I've never been to The Soul Society." He replied rudely "And as far as what I am... I'm human."

A blatant lie but there was nothing she could do to prove him anything else. His gigai and the tranformation hid his Hollow traits perfectly and the only way for anyone other then Tessai, Urahara, and Yoruichi to discover he was an Arrancar was if he left his Gigai... and even then everyone would just assume he's an incredibly strange Hollow and nothing else.

"Now if you'll excuse me Shinigami I need to get to Urahara's." He told her irritably.