Night-howlers

To start this off I own the copyrights to this story. I own the characters. So please do not try to take my story. Thank you
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2.5 billion people killed by the thousands by a planet 7.5 billion kilometers away. Families destroyed, loved ones torn apart.
Finley Firth, one of only fourteen hundred who survived the Plutonian attack. Finley's parents were killed by the planet's destruction. And only five out of his nine siblings survived.
He along with the remaining plutonian survivors were transported to Neptune's many hospitals and sanctuaries. His betrothed's family destroyed; his youngest sisters killed. His friends, his people killed for nothing, but started everything.
Once old enough he joined the Arco. Finley, along with his younger sister Flora became part of the first expedition to explore and scavenge earth. They were only meant to find out the planet's secrets, but they found much more.