Toothless is a fictional character from the animated film series How to Train Your Dragon. He is a Night Fury, a rare and powerful dragon known for his speed and agility. Toothless has a sleek black body, large green eyes, and retractable teeth, which give him his name. He forms a close bond with the main character, Hiccup, who helps him overcome his initial shyness and fear of humans. Throughout the series, Toothless showcases his intelligence and loyalty, often assisting Hiccup in various adventures. He is also capable of producing a unique plasma blast, making him a formidable ally. Their friendship highlights themes of trust and understanding between different species.