Sin was originally a Russian aristocrat, but lost her family after a series of unfortunate events. A member of Anti-Entropy since age 12. She spends most of her time aboard the Anti-Entropy battleship, the Moonlight Throne. She is an old acquaintance of Bronya's. She is vicious and cruel, capable of invading Hyperion on her own.
An Executor of Anti-Entropy who can manipulate time. She has fearsome fighting power, but her arrogance often results in her getting what she deserves.