Rivendell Resident is a term used to describe an ELF, which is a mythical creature from J.R.R. Tolkien's fantasy world. Elves are known for their long life spans, magical powers, and connection to nature. They are often depicted as wise and noble creatures, and are often associated with the Lord of the Rings trilogy. Rivendell is a fictional Elven city in Middle-Earth, and its residents are Elves.