Identity Steal: Sentinel #Wattys2015

Living in a world overrun by fallen angels, egotistical gods, and divine beasts - humans exist in a constant power struggle against numerous other hostile entities. Weak and mostly powerless, their hope for survival relies greatly upon the birth of a Destiny Code, a wandering spirit born as a human every five hundred years.
With the ability to open the gates of multiple heavens and hells, the Destiny Code can be the key to peace and order - or it can easily cause the world to fall into chaos.

As a child, Sentinel never intended to leave her country home. But in the span of a day, her life was turned inside out when a cloaked man appeared on her doorstep, demanding her departure.
Much to her surprise and reluctance, she is separated from her mother and transported to Penntrion, an academy meant for training young boys into elite guardians for the Destiny Code.

Forced to conceal her gender, Sentinel begins her new life alongside five other children - all of whom possess unusual pasts and, often, dark secrets.
As she eventually adjusts to her situation and learns to cope with Penntrion's harsh regulations, Sentinel slowly starts to suspect that she herself may well be closely related to the threat that hangs over humanity.

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