This is an absolute farce. There's no need to listen to anything the (fake) child priestess and a random hobo from the streets are saying. A priestess or not, she's just harassing people. "I don't know where I am from, I don't know your mother's name or what she looked like, I don't know where I met her, I don't know my own bloody name. In fact I don't even know you, but I know I'm supposed to say you are my daughter." <- That's pretty much the whole case here.
If Ellie really must go along with that foolish scheme, they should get a real priest/priestess involved, not some little brat. If the whole reputation of the temple was on the line, things would proceed more according to the textbook.