holy shit

this is such a toxic relationship honestly, a relationship built off revenge and rage
it doesnt seem that wilhelm knows dietrich is alive which is a plus because if he hid THAT then thered be little else he could do that would be worse.
ever since we knew that his coffin was empty, i kind of had the feeling he wasnt dead. it was a simple barbarian attack, not a monster that would have eaten the corpse or anything, so there was no valid reason to not have a single bit of his body to bring back. anyways, the fact that hes alive is definitely going to be a tension point later, rein will wonder why she had to give up her original feelings for him if he never died in the first place (i also kind of have a feeling shes gonna get pregnant, and that will be another point of tension due to it being wilhelms)
but honestly, i feel like the actions of wilhelm fit his character. he is in a way still like a child, emotionally unintelligent but he schemes and plans like a pro. he hid the cloth just like a child would hid the fact that one parent may be doing something bad because they want both parents. hiding truths to keep something they want close is a common behavior even in adults so wilhelm is not a poorly written character, or even a bad character. its just a gruesome story.