The Twins of the Prophecy

Twins, both identical girls, were separated at birth. One, Lilith Bellatrix Earl, was raised to be evil by a headmaster with the name of Dracula. The other, Lucina Bellatrix Earl, was raised to be good by a headmistress named Valerie. They grow up learning magic, both very powerful and excelling in it. Prophecy says that the two twins are powerful but are bound to be on the same side eventually, after fights and duels. Will both turn out evil or will both turn out good? Will they duel each other to death so in the end, they are on the same side, by both being dead?
DISCLAIMER: concepts from other books including names of characters(like Dracula), places from other books (like Hogsmeade in Harry Potter), and some spells (like the unbreakable vow in Harry Potter), etc.