Damn, he so Cold when its about his kid and family. I think most are having wrong impression of the relationship of sansui and dewey. Sansui know already in the beginning that dewey is a spoiled ass bitch but he follows her for rain and the fact that he somehow respects her. She is spoiled but she is fair and sees merit only on your skill. If not for dewey, rain would have been in huge trouble as she grew up. So he respects and is thankful for that. And ofc he knows that whatever she commands, he should obey but sansui Still has his morals otherwise everyone he met before would have been dead. So her commanding him to kill the intruders is totally fair for sansui, u fuck with his fam and his daughter and he wont bat an eye killing u. His master said it too, if he wants to kill he will kill. And right now he definitely does hence the dead ass angry face