Character Caine, played by Donnie Yen, in the film John Wick 4, is described as a blind man but with exceptional combat skills. He uses a cane, which also serves as a weapon in his fights. Caine has an imposing presence and a combat stance that highlights his experience and skills. His physical appearance, although not very detailed in terms of specific characteristics, is marked by a style that combines elements of elegance and practicality, reflecting his sophisticated and dangerous nature.