Favourite minor character?

[Aaron]

With such a rich world as Middle Earth, there are many characters who only appear fleetingly, who we never get a chance to learn much about, but nevertheless make a massive impression on us as readers.
So, who is your favourite minor character in all of Tolkien's works?

For me, the honour has to go to Queen Beruthiel. I have always been intrigued by the Black Numenoreans, and I love the idea of one of their number rising to become Queen of Gondor. I am just very fascinated by her in general. Why was her marriage childless? If she was cunning enough to try and spy on her enemies, shouldn't she have birthed an heir to ensure her position was untenable?

Just such a fascinating figure, and I wish we knew more about her