Shusuke would act differently with each. 

Blue: "Hey guys." *Tries being nice and stuff at first, but knows a fight is about to happen* "Right. Let's do this." *Fights*

Green: "I'm gonna fuckin burn you to ash." *Proceeds to try and destroy*

Gold: "Got any tea? Or good juice? I think Rin would enjoy it." *Waits patiently* "No?" *Waits* "Fine >_>" *leaves*

Aside from that... Meh... Nobody knows the silver King.

EDIT: Hehe... Probably go down just like how Kitty said. XD