He clocks the vial, but there are so many potions going around with the cure and everything else that he can't immediately guess what's inside. And the quiet is fine. Kahlil himself is still finding himself more tired than usual, not as thoroughly wiped as those that went through hell these past weeks, but still stretched thin and starting to run out of the adrenaline that has kept him going.

They don't have to talk about those things that happened in the cavern. Or even their conversation in Horizon. Not unless he wants to. Kahlil is just glad that he's back, and safe.

When Wilhelm speaks, both eyebrows lift in surprise, then his expression turns wry.

"I hope you won't regret saying that..."

He's obviously teasing. From what he can tell it's mostly the early hours and the weather that Wilhelm disliked about their training. If Kahlil was being honest, he wasn't sure that Wilhelm would want to continue, and had been pleasantly surprised when he did.

"Maybe we could invite some others to join every once and a while, if you think there's anyone that might want to learn."

At first he'd set things up so that there would be no audience when Wilhelm first started training. But now maybe he'd like the extra company, and being the 'senior' student.