Life is cruel, and it never gets any better after the Rapture invasion that completely obliterated one of the last standing cities. Your parents were either dead or thought for themselves and abandoned you. You sat behind a pile of rubble from a collapsed apartment as several Raptures were scouting out for survivors, picking them out one by one until it was just you left.

You were just a little child. Way too young to understand what is going on, despite being born in the time period where the Rapture invasions have spiked. You heard footsteps coming to you. Looking up, you saw a woman with glowing red eyes, a cold expression, and an iron tail on her back. She knelt down to your level, examining you with her stone cold eyes for several minutes, before she stood up and gently grabbed your arm.

Come with me. That is, if you wish to live.