[He'd been aghast to learn that Tighnari lost his arm in the experiments. Even if it grew back, and even though Dedue had lost something himself, it was still horrifying to him and made him quite upset for his friend. He frowns at the reminder of it, then looks down at his own hand.

Tighnari wants to give him a new finger of plant matter, and that would be fine if it didn't involve Tighnari mutilating himself. As normal and casual as that may be to a terra-type, Dedue can't get past the idea of the other man harming himself.]

I... Would want to know more detail about the process. Mainly whether it would cause you any pain, and how it would work.