Once she got past "HOSHIT ITS THE RAPUNZEL HOLY FUCK THIS IS EPIC!"

She thinks Rapunzel is a doll. She's a sweetheart. She has such a big heart and so much friendliness and love to share that Julie almost wants to protect her because she's worried someone would take advantage of that.

And she'll be damned if Julie would let anyone hurt her. Julie considers Rapunzel a friend. One of a great one.