For her to not be lost, you need to hit all the points... Let me elaborate, all you have to do is to have a correct path so that she won't lose path... As you can see from the medieval portal where Dalia and Orion is in the cell, there is a question that Dalia talks about a private island... From there, if you don't get her to say the password that means there is a question where you made a wrong desicion... For example: in the beginning when Dalia and Penelope was introduced there is a question and you have to answer "don't ask anything in return" (idk if this is right I forgot the exact sentence) and there are much more decisions to get more points... So this means you have to go back in the previous scenes where you have a wrong decision..