Alucarda (1978) on Netflix

After the death of her parents, a young girl arrives at a convent and brings a sinister presence with her. Is it her enigmatic imaginary friend, Alucarda, who is to blame? Or is there a satanic force at work?

When the teenage orphan Justine arrives in a convent, she befriends Alucarda, who was raised since she was a baby by the nuns. They become best friends and stay together most of the time. When they meet a gypsy on the forest, he is indeed Satan and possesses the teenagers. Soon the convent is turned upside-down affecting the lives of Alucarda, Justine, the nuns and Father Lázaro. The skeptic Dr. Oszek will also witness a showdown between good and evil affecting his beliefs.

—Claudio Carvalho, Rio de Janeiro, Brazil

A young girl's arrival at a convent after the death of her parents marks the beginning of a series of events that unleash an evil presence on the girl and her mysterious new friend, an enigmatic figure known as Alucarda. Demonic possession, Satan worship, and vampirism follows.

—acidxian