I have to admit, that first sentence had me all confused. I was all, "Wait, but. Archer isn't from FMA, he's from Fate..." until I realized what you meant.

Rider will do his best to teach Ryuunosuke that killing has a time and a place, and it is on the battlefield in glorious combat when your opponent is a worthy foe. Not little kids.

I do not expect that lesson to take. :|

AND NO THROW AWAY GO AHEAD