Board Thread:Questions and Answers/@comment-24499616-20140208162134/@comment-11051098-20140208222543

I would say that he was more emotionless, that he didn't really care the slightest about other individuals, only following Aizen's orders.

For example, I think he said to Ichigo upon being ordered to let Orihime go, that he had received no order to kill her yet.