[@Red Mage][@Crimson Lion] I was thinking about that last night. This would depend on whether or not Saishu had met Takuya or Shiroko first. 

Scenario A. Meeting Takuya first would allowed for all three of them to be friends. With Shiroko being added to their small group of silence. If she had been a guy it would have been a different case.  

Scenario B. Meeting Shiroko first have him creating a possible negative reaction on Takuya. He would be comfortable with Shiroko and considering he gambled on her, he'd consider Takuya another gamble and probably not take the risk. Opting to tell Shiroko he'd see her later, leaving Takuya with a kind greeting, and leaving altogether.