Responses
*Kyu
I disagree. Both of them will have to come to terms with their backgrounds but I doubt that they will stop being allies. They have worked with each other for so long and almost understood everything about each other.
^ Not to mention that Kyu does not associate Ryu strongly with Pluto and will probably eventually realize that Pluto's mastermind is the only true enemy who caused his father's demise.
So in other words. That detective was Kuy's father(?)! And he died because of Pluto which will make it difficult for Kuy to keep being friends with Ryu... =(