I was -- a stormtrooper, once. I mean, I assume you know that. That Poe told you, and that's why you're asking. The day before I left, he saw me hesitate on the battlefield. When I helped Poe escape, they all knew it was me. They're not big on traitors in the first order.
I went back to Starkiller Base with Rey, to destroy it. After he killed [...] our friend, we ran outside into the snow, and he chased us. I think his endgame was just... to kill us both. He seemed particularly interested in killing me specifically. I'm not really sure if there was a bigger overall plan than that. He threw Rey up against a tree, knocked her out cold. So I picked up a lightsaber, and I fought him.
I'm not really force sensitive, and I don't have a lot of lightsaber training. Plus, you know, I'm not really down with murder. So he got the upper hand eventually. Knocked my lightsaber out of my hand. Slashed me up pretty good. Last thing I remember is a lightsaber slash down my back, falling face down in the snow.
When I came to, I was in the medical wing of the ship. Found out she really kicked his ass.