HP: After Being Transformed into Snape's Sister

On Christmas Eve, two new members came to the Snape family - brother Severus and sister Demian. Demian, who was still a baby, bid farewell to the "unknown" light that sent her in a daze in Irene's arms, and slumbered the abilities of "protection" and "healing" in his body. After arriving at Hogwarts, she met precious friendships, experienced beautiful and innocent heartbeats, and also encountered extreme pain. Eventually, Demian became Demian. Demian shaped Demian.