What I really love about elves, among plenty of other things, is the fact they live a very long time. There is so much to explore in that regard because of it.
I drew this piece recently of an elf mother and her first daughter, the thing is they would almost look the exact same, the mother is just 18 years older than her daughter who just turned into an adult, they have the same outfits, tattos, features, hair color, body types,... They basically look like twins. What will happen with them in the game is that everyone including the MC will keep confusing the two, but they will also assume they are sisters and at some point in the story it will be revealed they are mother and daughter.
Is there anything else I could add with this concept? And how do you use your elven characters if you have any?