Tharquia

You died in an accident, and upon dying, there is nothing, you see nothing, only a male voice that tells you: Save them

You wake up, and with it, a new body. You think it's a game; you're in a beautiful but dangerous forest. You hear a noise in a bush and, startled, you throw a rock hard at it and—
OUCH!!!
A beautiful elf emerges from the bushes, wearing a white dress and with light blue hair and eyes, carrying a sword.
What's the matter?!