Now I have to wonder why someone would want to assassinate this girl. Discrediting her, sure, I get that, that's the standard otome game style situation. But I can't see how killing her would have helped these two. Surely they realize that if the prince's fiancee were to be murdered, he would turn the whole country upside down if he had to to find out who did it? And it's not like their actions were very well-hidden: they would have been found out quickly. But putting that aside, if this were just about Irene trying to get together with the prince, killing Elianna would be counter-productive.