Baba Yaga's horsemen

In Russian folklore, Baba Yaga's forest is patrolled by three horsemen, who wear clothing that match the colors of their horses' coats. The White Rider appears at dawn and heralds Day, the Red Rider appears at noon and heralds the Sun, and the Black Rider appears at the end of the day and heralds Night.

Baba Yaga's horsemen in "Slue-Foot Sue and the Witch in the Woods"
When Slue-foot Sue alighted in Russia, the first person she saw was a handsome man in fine, white clothes on a lovely white horse. She called out to him, but much to her irritation, he ignored her and leaped into the sky. Just then, daylight began.

That night, after winning a magic duel with Baba Yaga, Sue saw another rider, all in black and on a coal black stallion who offered the same apathetic response to her entreaties as the first one had.

Sue never met the red rider.