The Baskervilles were one of the four original Great Dukedoms before the Tragedy of Sablier happened.
Though how the Baskerville Family came to be is unknown, the only known legitimate Baskervilles were Glen and Celia .
Other members of the family were outcasts who were accepted into the family after being chosen by the Abyss itself, being surrounded by its light and brought to the Baskerville mansion. The Abyss also granted the Baskervilles special powers when accepting them into the light, making them more Chain-like than human. The Baskervilles gain heightened abilities such as with speed and strength, and they also gain the ability to heal themselves of their wounds, the younger Baskervilles being able to heal more quickly than their elder colleagues. The servants of the Baskerville Dukedom obeyed Glen whole-heartedly, no matter what his request was.