“You just think about the life you’ll have together after the war, and you do it for her. That’s how you know you can win!”
1) everyone head cannons that this is Jasper fused with some other gem
2) Jasper admired Rose’s tactics in battle
3) What if THIS is what she was talking about?
Pearl throwing herself in harm’s way at the last instant. Pearl sacrificing herself for Rose.
It wasn’t tactics that Jasper admired. It was the idea of using weaker gems as cannon-fodder.