
If I remember correctly in the novel she is till not repenting to her sins and staying in the convent i think? I read it like last year so my memory is londa hazy about her because atleast the prince got a second chance of true love. While Hess and Kael being adorable pookies. If I can get the link again I will come back here to DM youu (≧∇≦)/

She'll go fanatically crazy over her god and eventually get dumped when the emperor dies. But it's not like prince dumped her they mutually decided to let each other go on their own separate paths.(however emperor truly adored and respected her so she was set free with little to no face slapping). Helios will have a new love story with arrange marriage trope to a baron's daughter (which ofc will be recommended by hess for empress position)

Yeah to add on what pp already said, at some point Helios gives Diana an ultimatum, due to his position as a king needing an heir for kingdom stability, either we have heirs or we divorce. So they end up divorcing, after a while he is looking for another queen (ironically with Hess and Karl) and ends up getting married to a sweet girl.
Can anyone spoil me of what will happen to the bitch of a saint?