Flói, a Dwarf of the Lonely Mountain, was one of the companions who went with Balin to reclaim Moria in 2989. When they reached Moria, they found Goblins and there was a battle fought near the Mirrormere. He killed a great enemy before he to was killed by a Goblin arrow. Flói was buried under the grass near the Mirrormere. His death was recorded in the Book of Mazarbul.