Okay, this girl comes out of nowhere, proves herself to a capable ally in the making of the movie, gets all the rentals in one room and make the two work together, coordinates the entire project and gives a short term goal for those involved, then proceeds to have a heart to heart with Mizuhara and force her to see two realities [1. that not all her customers will see her as a mere "rental" and 2. Kazuya is one of them] that she willfully blinded herself to, making Mizuhara finally have a perspective shown to the audience about her relationship with Kazuya and set things into motion! And she took the direct approach and made each and every one of her points clear.
Man, I love this girl! Best character in the series so far!