Heinz in the novel later comes as an hypocritical idiot, he made the Alda's peaceful faction aimed to protect all of Vida's races, this of course doesn't fully follow on it because he still went around destroying settlements of ghouls and such, nobles only wishing to accept this faction to be closer to the hero Heinz, and later comes to accept that the only way to atone is to get killed by Vandallieu as what he's done is unforgivable (he walks back from the settlement between him and van because of the demon lord fragments but still plans to fight Van later on so he can get killed by him).
He later goes to release Bellwood from a seal of an Evil God that was tormenting the old hero by making him relive all of his mistakes and sins over and over again, by telling him "It couldn't be helped" (or something along those lines).
Wait, the new princess lefdia is just a right hand? I can't tell if it's a missed opportunity or if I am way too tired to tell between left and right in images