As always during moments like this, he's glad that his mask can serve the dual purpose of hiding the scars that might scare other people, and concealing any emotional reaction that he might have. A mouth manifests from one of the inert tendrils at his side to disguise the strain in his voice as those spares are less affected by such things.

"I can speak for myself, sir, but your support is appreciated." Dedue has put himself in the position, at least in Shouji's mind, of someone that can be fully trusted. "If there is anything I can do in return, please say so."