Sano seems rather cold when you are first kidnapped. But if you get on his good side, he'll warm up. Sano likes to feel in charge of a situation and like he has power over his captives. Cooperation from a victim is appreciated and often rewarded. However, Sano also wants his captives to last as long as possible and when a captive makes a reasonable request, he's likely to fulfill it should the victim have been cooperative up until that point.