Prologue Terrifying Dreams

Whenever I fall asleep I always have the same dream. I'm drowning under water gazing up at the full moon's light. I can't breathe or move, but for some reason, I'm not scared. As I continue to fall deeper and deeper, the light gets farther away from me. I continue to fall until I'm engulfed in darkness and then I wake up.

I don't know how long I've been on this planet or how I even got here. I wonder this lonely isolated planet by myself and through its lush thick greenery. I'm not sad, but I pray to whatever god that hasn't given up on me to tell me ...

who am I?