Elf x immortal/ageless human

Hello! I have been made aware of the anime series " Sousou no Frieren" and thus, would like to RP an idea based around one of the plot points!  I'm looking for someone to take on a role of an elf woman (preferably Frieren herself, at least as the reference - don't need to stick to her character at all; feel free to make your own OC though!), who is hundreds or thousands of years old.

The basic premise, is that she's one of the few, remaining elves in the world, with not a single one sighted on the continent she is currently living, making her the "last" one (or simply the last, if you'd like that). Because elves live a very long time (or maybe even an eternity, unless killed), she didn't want to seek a relationship, as she did not want to watch her loved ones inevitably pass away.

However, there were rumours about a particular, human male, living miles away from the city. He was supposedly "immortal", already over a hundred years old himself, while not looking a day older than in his mid twenties. Was he cursed? Blessed? Nobody knew, just as nobody knew if he was truly "immortal", and why would he choose isolation.

This is where the roleplay would begin, with your character seeking out this man to find out if his immorality is real. As to why she'd want to know that... That's up to you to decide, but I suppose a nice romance plot is writing itself here, with plenty of adventures to spice things up!