#especially along the lines of Elrond seeing himself as not being fully elven or as wanting to maintain a connection with his human side

[thesummerestsolstice]

There's this implication in Tolkien's writing that half-elves are kind-of immortal by default, and that they stop aging unless they choose mortality (though arguably they don't even really age then). See Arwen in the Lord of the Rings, who is several thousand years old and has clearly been living life as an elf, despite never having made the Peredhel choice.

I always wondered why Arwen was given that choice, actually. It seems like the Peredhel choice is mostly given to people who have a mortal parent and an immortal parent (Earendil, since Tuor was definitely mortal when he was born, and arguably Elwing depending on how you see Dior), or at least parents who are undecided (Elrond and Elros are born before Elwing and Earendil make their choices). Arwen is a fair bit more than half-elven, and has two immortal parents. And there's not really any evidence Elros's children got the choice. Why does she get to choose whether she wants to be mortal or immortal?

Now, this could just be some minor world building weirdness, but it raises another very interesting possibility. That Elrond, by the time his children were born, had not committed to being immortal, and was instead undecided. I feel like there's so much to explore in that idea. Maybe Elrond truly wasn't sure about his choice to stay immortal forever until much, much later in his life. Maybe he held off choosing specifically so his children would be able to. Maybe he didn't choose because he didn't want to have to pick between being an elf or a man, and just wanted to be a half-elf in peace.

There's also something very compelling to me about the idea of an Elrond who could have, at any point during the Second or Third Ages, decided to be mortal. Who could have left the grief and struggle of Middle-Earth behind forever, and who, nonetheless, always chose to stay; picking immortality, not once, but a thousand times over the course of his long life, no matter what difficulties he was faced with.

It would also be interesting to explore the idea that most of the people in Elrond's life assume he decided to be fully elven long ago, only to realize that that isn't actually true. I imagine it could be disconcerting, maybe even really anxiety-provoking to realize that someone you were certain would be around forever might not be. I also think it would be really hard for a lot of elves to understand why Elrond might not want to make that choice.