Blancwing is a fictional character from the Kamen Rider series, known for being the loyal contract monster of Kamen Rider Knight. As a large, white bat-like creature, Blancwing aids its Rider in battle by providing flight capabilities and powerful attacks. Throughout the series, Blancwing plays a significant support role, helping Kamen Rider Knight face off against various adversaries. Its unique design and abilities make it a memorable companion, symbolizing the bond between Rider and monster in the Kamen Rider Ryuki universe.