Responses

They're probably dropping hints to get readers to be more wary of Christian from earlier on. Also the author may have wanted to change the pace of the story or some of the events retroactively where they couldn't in the actual novel. It's a different form of media and certain aspects are subject to be adapted differently (and sometimes worse)
why did they introduce the christan backstory so quickly?? in the novel it was introduced in chp 30ish and if they did introduce it why did they left it incomplete?? I'll tell you what happened basically he at first treated her gently after lying to her about getting permission from her house to take her to his own. After that he grew tired of her and started treating her roughly, this bitch then deliberately let her listen onto his convo with someone that how he should hurry and let her sire a heir who has both the powers so he could throw her away. because he knew she was listening onto to his covo he then confronted her and imprisoned her. He tortured her emotionally and physically and no longer put on his kind man facade. the fl then got in contact with her shit fam and planned an escape but during the escape she was found out and she dies because of mana burst or some similar crap as she hadn't used her powers in a looooong time and it had built up inside her so when she tried to use it to escape she ended up dying.