Valak became evil by falling from its original status as an angel. Initially, Valak was an angel who participated in Lucifer's revolt against God, which led to its transformation into a demon. As a result of this rebellion, Valak was cast down from heaven and stripped of its angelic status, becoming a malevolent entity associated with Hell
. In the lore of The Conjuring Universe, Valak was summoned to Earth by a Duke obsessed with the occult but was later sealed away by Christian knights using the Blood of Christ. Valak's evil nature is intrinsic, and it was imprisoned due to its dangerous demonic powers. It was released during the bombings of World War II, unleashing its terror once more
. Historically and in demonological texts, Valak (also spelled Valac) is described not as a nun but as a demon who commands legions of serpentine spirits and can summon living serpents. The depiction as a demonic nun in the movies is a creative adaptation to enhance its terrifying presence by subverting the symbol of a nun, which is typically associated with purity and safety
. In summary, Valak's evil originates from its fall from grace as an angel who sided with Lucifer, becoming a powerful demon with a nature inherently opposed to good
