So Derpy is a... Space-faring Roman Assassin who was also a Jedi Knight of the Holy Imperial Inquisition who had defeated a Predator in single combat and who seemed to have originated from one of the Stables in the Neighponese Wasteland. Can't explain the half-tied up boot though. Or the CCCP label.
I got the katana and the PipBoy/PipBuck(Is it? Cuz that's what it looks like). There is also some sort of retractable claw, the Predator Blaster(That I didnt get because I dont play Mass Effect or anything like it), and that Roman-style space helmet.
Forgive me if I am being horribly inaccurate with the specific crossovers, but this is still awesome.