Boris Borisovich

Boris Borisovich is one of the characters in the Frost and the Maiden fairytale told by Dunya to Marina and her four eldest children in the Bear and the Nightingale on the night the ram is born and Marina reveals her pregnancy with Vasya to her husband, Pyotr.

Description
"'Boris loved his daughter, after all, and the cold embrace of the winter god is not for mortal maidens. But perhaps Darya had a bit of magic of her own, for her husband could refuse her nothing.' — Dunya describing Boris and his feelings about Marfa and Durya"

Boris loves his daughter, Marfa, whose mother died in childbirth. However, he is unable to say no to his second wife, Darya Nikolaevna, who possibly possesses a bit of magic that makes her more convincing or unable to be opposed. He does not intervene when Darya gives Marfa difficult housework in an attempt to make her ugly or when she favors her own lazy, ugly daughter Liza over Marfa. When Darya announces that Marfa will be left in the middle of the woods to be married to Morozko, the master of the white snows, the black firs, and the silver frost, Boris is horrified and weeps for his daughter but ultimately follows Darya's instructions.

Later, when Marfa returns with the cloak of Morozko and a chest of treasures, Boris cries tears of happiness and relief. However, Darya and Liza are jealous. Darya insists that Boris leave Liza in the woods to be rewarded even more by Morozko. Despite not wanting to, he follows Darya's commands again. Hours later, Liza has not returned. Anxious, Darya tells Boris to go get her from the woods, sure that she will have at least two chests of treasures.

However, he arrives to the same tree to find Liza dead. When he brings her back home, Darya dies as well upon seeing her dead daughter.

Parallels to the Series
Boris's character is parallel to Pyotr.