Rachel and Nathan are proof that sometimes it really does work out to go get coffee with that guy from a dating app.
While Rachel and Nathan are different in a lot of ways - for example, Rachel's a structural engineer with an artistic side and Nathan's an incredibly logical violinist- they are the same in the important ways. Some of those ways are their love of board games, their faith, taking walks (maybe that one leans a bit toward Rachel...), and each other.