In the story of Baba Yaga, Baba Yaga commands three riders who she calls her "round, red sun," "white, bright day," and her "black, dark night." They are physical manifestations of morning, noon, and evening as they "ride" across the world.
I'm just starting to explore some silhouettes. I know that I'd like them pictured on their horses, so am more looking at their overall appearance on their horses. Focusing on the designs on their helms and posture when on horseback.