[Edelgard leans closer, taking her time as she begins to pull the brush through the bottom strands of Byleth's hair. Slow, steady, just working out the tangles from the ends to make it easier as she gets further up.]

I've been alright. Having you and Corrin both near has helped. And I admit, I'm not as concerned about my inability to swim.

[Chuckling to herself...]

Not needing to breathe has some benefit.