I think one of the more tragic aspects of what 3H is doing with Jeritza is how making him Mercie’s half-sibling explains a lot of his identity. He’s half Bartels, unlike Mercie, and he associates that bloodline, including himself, as violent and dangerous to Mercie
With Dietrich being confirmed as Lamine, I hope they won't try to retcon Death Knight as some mystical curse haunting the bloodline but rather Jeritza just having DID