Maeglin is a character from J.R.R. Tolkien's legendarium, specifically featured in "The Silmarillion." He is the son of Eöl, a dark elf, and Aredhel, a princess of Gondolin. Maeglin is known for his exceptional skills in mining and metalwork, as well as his tragic fate tied to the fall of the hidden city of Gondolin. Maeglin's story is marked by his unrequited love for his cousin, Idril, and his eventual betrayal of Gondolin to the dark lord Morgoth. His actions lead to the city's downfall, showcasing themes of ambition, desire, and the consequences of treachery in Tolkien's works.