Legolas has a twin sibling (brother or sister). What happened to them? Did they die? Did they run away? Are they still around? What are they like? What do they think of certain events? Most importantly... How does Thranduil treat the twin siblings? Equally? One better than the other? Possible genres: Family, hurt/comfort, angst

Optional requirements: My personal favorite headcanon is that Legolas is named after his mother, and in that case, her name is Laurelasse (may have misspelled that). As such, his twin should also have a name that ends in -las. But that's of course optional.