It's a little confusing to try to listen and read at the same time, to respond verbally so that the guards don't get suspicious of the silence and simultaneously think about his reply to the message. Flustered, Wilhelm stammers for a second before adjusting to the rhythm of their double conversation. He swallows and nods.

"Okay..." He'll try not to worry too much. He'll hold onto Sergeant Ward's name. His eyes move between Kyle and Istredd. "I'll keep up with my training routine. And I'll practice my magic."

Things that he once begrudged, or outright avoided, but now they keep him balanced. They keep him pointed forward. His grip loosens from the bars, fingers falling to the wooden brooch pinned to his tunic, as he adds:

I figured Lucifer knew something was happening. That's why he gave me this right before the coup. He's not going to get in trouble too, is he?