Each new character expands Naori's understanding of the world: Family Head's fears, Aju's double-life, Mikage's duty, Doctor's contradictions, Slayer's violence, this Guy's (?). All different perspectives and ways of handling the world they live in.
Naori clearly absorbs these lessens and thinks about how she can help Hinata and herself and that's one of my favorite aspects of her character. She's finally got another human bartender to confide in, who also seems to have a unique view of the status quo.
Meanwhile, Hinata continues her "introduce and show-off my (soon to be) gf to literally everyone I've ever known" tour. You can't be a prouder gf than her, so it sucks that Naori still feels inadequate in many ways.