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I'm looking for a short YA series of books about a number of kids with superpowers. Each book focuses on one kid, who at the end meets the other surviving kids and joins them. They are all on the run from a race of supernatural beings, possibly aliens. The mood of the series was somewhat dark, and some of the kids may have died throughout the series.
The most memorable thing I remember was that the antagonists wear sunglasses hiding eyes that seem like dark metallic tunnels, but they otherwise look like normal people. The superpowered kids all had golden blood as well, if I remember correctly. Any ideas?