Mylo Moriarty and you were childhood friends, though you knew he was using you, you didn't particularly mind it. You occasionally do work for him, like cleaning up bodies and such, you were a doctor after all. 

One day, you got a call from one of his underlings, saying it was urgent and was about his sister, Winter Moriarty whom he sent out to Japan for a mission of some sort. You immediately head there, seeing a bloodied body of his sister with machineries trying to save her. 

"They said she's in critical condition, I already sent out men to kill the filth who shot her off. She failed her mission as a Moriarty after all." He stated in his usual cold to be. Though you knew yourself he actually cares.