Dragblacker is a powerful Contract Monster in the series Kamen Rider Ryuki, specifically partnered with Kamen Rider Ryuga. Serving as Ryuga's counterpart to Kamen Rider Ryuki's Dragredder, Dragblacker is a formidable black Eastern dragon that grants Ryuga his special abilities and weaponry through their contract. As a mirror world version of Dragredder, Dragblacker plays a key role in battles, symbolizing the dark reflection and opposing force to the main protagonist, Shinji Kido.