Gwindeth is found inside a cave, Gwindethrond, the entrance of which is situated behind the waterfall in Rushingdale near Lake Evendim. She also appears within Haudh Elendil and the Flooded Ward during two quest instances.
She was an adviser to the Kings of Arnor and has lived for many centuries. Her exact nature is unclear; her connection to Lake Nenuial points to her being a water-spirit similar to the River-maids but her temper is more stern; it is also possible that she is a Maia who decided to remain at the Middle-earth. These two theories are not mutually exclusive.
- "What brings you to this place?"
- "I am the caretaker of Nenuial. Do not disturb its peace!"
- "I was a friend to the kings of old. Can you say that?"