Failure

The organization always emphasized on 'distrust.'

Even though these organization members would work together during mission, but it was hard to say that they would trust each other.

They would only cooperate.

And that was for a very limited amount of time.

Once they were done, they would not contact with each other again. Without any goal or mission from the organization, there was truly no need for them to have any contact.

Most of them were lone wolves.

And this was mainly because of the test given to them before they could officially take any mission.

They were given partner when they were young and started training.

But when they grew up, they had to eliminate their own partner. 

The person they trusted will be the one they needed to kill if they wanted to survive. 

Under that brutal pressure, they knew very well that the moment they showed any closeness to someone, the organization will target him or her.