The warrior sits atop the white horse, a symbol of strength and courage. They are clothed in shining armor and hold a sturdy shield in one hand and a sharp spear in the other. A blue and white banner with a noble insignia is draped over their armor, signifying their allegiance to a particular cause. Their gaze is firm, their posture determined, as if they are ready to fight for what they believe in.
To bring the drawing to life, I would start by coloring the horse white, while adding some subtle hues of grey, tan and black to give the horse dimension. The armor can have metallic hues such as golds, silvers and blues, while the banner and shield should have a combination of blues, whites and possibly even a touch of red. Last but not least, the warrior themselves should be given a powerful presence by making their skin color a rich cocoa brown, a fitting representation of their courage.