The ninja may have seemed to be calm, if aggravated over the situation, however he had remained on guard the moment his thoughts had cleared. He couldn't know what she was intending to do to him, but he was prepared regardless and would keep control where he was able.

Refusing the bit, however small an action, was something he took as a victory. A short-lived one as any thoughts of triumph went flying from his head along with anything others he may have had.

One flipped switch and Kurogane may as well not have even been introduced to what was happening to him - all explanations had been wasted breaths on the doctor's part. Only his body reacted now, jerking against the restraints wildly with the flowing currents. Whatever control he'd intended to either keep or take was gone.