He is described as a proud and beautiful elf, with long silver hair and piercing blue eyes. He is a skilled warrior and a powerful sorcerer, but he is also known for his coldness and aloofness.
While he initially appears to be an antagonist in the story, aiding in the capture of Thorin and his company, Thranduil ultimately plays a more neutral role. He is driven by his own interests and concerns, but he does not actively harm the dwarves.
Thranduil's character is further explored in Tolkien's *The Lord of the Rings* where he is mentioned as an ally of the Free Peoples.