elodie can differ wildly based on what you have taught her, obviously, but the most important thing I can think of is her inner core of innocent naivety.

Remember how much you have to teach her to keep from just going with her first thoughts, ie. putting sick people together making them die faster, the "oh i thought i heard one time to push the arrow through your body if you get hit" stuff, the "oh, chocolates from a stranger omnomnom!"

Similarly, remember how quickly she tends to jump to conclusions and stick to them until she learns otherwise.

If you know what skills you are using for her route I can give more specific advice, because obviously a Faith spec Elodie is a very different person than an Intrigue spec one (and doing both together is both really interesting and fairly unique)