Ellu prolly killed him cuz his family ordered him to do so, must've been political to start the war, it's all foreshadowed so far. That explains why he feels kinda guilty and the sudden exposition of his position and feelings towards his family. He didn't wanna do it but still did it to gain their love and validation or something, he's not painted as that much of a villain yet so they seem to set up a redemption arc for him still, they prolly won't kill him off at the end.
Ellu prolly killed him cuz his family ordered him to do so, must've been political to start the war, it's all foreshadowed so far. That explains why he feels kinda guilty and the sudden exposition of his position and feelings towards his family. He didn't wanna do it but still did it to gain their love and validation or something, he's not painted as that much of a villain yet so they seem to set up a redemption arc for him still, they prolly won't kill him off at the end.