"I didn't know it until I got started, but yes, being a soldier is what I'm best cut out for. Before my sister decided to enlist I'd never thought of it, so I owe her a lot." And he'd managed not to think about her for a little while. Not that it's bad to think about her, he just doesn't want to end up burdening Wrath with any more than he already has today. But it's surely going to show, the way his brow puckers a bit at the thought of South.