There should be a "Ridiculous Things We Think About When We Have Kids" board for this one

We're traveling this weekend, and my 4 year old is in a phase where she's pretending to be whatever princess and when she gets asked her name (restaurants, parks, etc), she answers with "Rapunzel," "Elsa," etc. I know I'm overthinking this, but I'm imagining a scenario where TSA asks her her name and they're not as fluent in Disney as the rest of the world. We're taking her passport with us, and I'm guessing a copy of her birth certificate might be worthwhile as well, but any tips for making her understand the importance of telling people her real name? We've tried every which way (importance to do so if she got lost, getting in trouble with someone in uniform, saying "My name is LO, but right now I go by Princess,") and nothing's really sticking.