A Drop of Blood

Pet has existed in a limbo of confinement and pampering as her owners use her for a symbol of their power.

During an attack they eject her in a survival pod and she ends up on a habitable world, working to survive.

When a group of men arrive and they seem to be looking for her, she fights the urge to run to them for safety, choosing to hide instead.

They find her anyway and bring her to their ship, and that is when she finds out that her true identity is not Pet, but it will be found in a single drop of blood.