>>283232014
>human and elf relationship complicated by their differences in lifespan and nature
>she sets out to find his spirit in the afterlife, which is a physical place you can travel to on earth
There's a non-zero chance this shit ends with Frieren becoming human in exchange for bringing Himmel back life as a young man again, so that they may share the remainder of their lives together.

That or he gets turned into an elf for being based, one of the two.