
I haven’t read the novel and don’t want confirmation.
I think it’s Atel and her family that ruin the empire after finding out she died and how she died. Because the prince and the queen killed her they probably lost all loyalty to the kingdom. Atel obviously loves her even as just a friend (during past life), so it would make sense he’d go on a rampage after killing one of his only friend if not only friend.
Iruma is clearly going to end up with Amare (def butchered that spelling). Azz and Clara makes sense, and it’s not like they’ll stop hanging out because one of them is in a relationship. Also I doubt they’ll get together this early; this will probably just be them start to recognize their feelings might be different from how they normally think of each other.
Or it could be nothing and they reiterated that them three are soulmates and live happily ever after.