Eva Rosier

Eva Rosier (born Corvus Rosier) was a Slytherin prefect in the 1991 - 1994 school years and a member of Lily Slytherin's Hogwarts inner circle. As a daughter of an Inner Circle Death Eater, Evan Rosier I, Eva was expected to serve the Dark Side in some capacity upon graduation from Hogwarts.

Early life
Eva Rosier was the elder of two children born to Evan Rosier, born 5 years before her brother Evan Rosier II. She was born Corvus Rosier and assigned male at birth, although growing up she realized she did not identify as male and was transgender. Growing up in a magical traditionalist family, this was immensely difficult, as her parents were very transphobic (in addition to being homophobic). In order to get back at her parents, she chose the name Eva as her new name.

Hogwarts years (1987 - 1994)
Eva was not given help by her Head of House, Severus Snape, in aquiring the appropriate potions and spells to complete her transition to female, and decided to reach out to the Transfiguration professor, Minerva McGonagall, for help. Thankfully, McGonagall was more receptive, and helped her learn self-transfiguration spells as well as pressuring Professor Snape to provide her with the transition potions.

In her fifth year, she ventured into the underground chambers with Hermione Black and Lily Slytherin to retrieve the Sorcerer's Stone.