It all depends on the trust. Sure they excavated us, but they are keeping us secret from the other species. We need time to trust them. So don't tell anything, if they don't ask...but if they ask, we shouldn't lie.
Six was our comrade, our friend, something like our sister. And yes, we were used. But we wanted to save her, and we did not want to go against humanity. But we comitted treason according to them, and wanted to kill us, so we fleed. And we were forced into battle, and were shot down.
I guess we feel guilty in a way, but the fleet has used us, and wanted us to kill Six, our only comrade. I guess we want to know what happened to Six and the Prime...but perhaps we are the only person, who can gain access to humanity's retreat dimension. If it still exists.