The romance and marriage of Arwen and Aragorn are unique in a variety of ways. The first and most obvious way is that Arwen is an Elf and Aragorn is a Man, which is not something that regularly occurs in Middle Earth. The next and perhaps less obvious, way that Aragorn and Arwen make a unique match is that Arwen is Aragorn’s aunt. However, because Arwen is also so much older than Aragorn, it is a relationship that spans not only race but also generations.