Zero

Zero is an 18-year-old human-avian hybrid boy with neon green eyes, black hair, and black wings.

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When we first see Zero, he's lounging on the shoreline of the lake behind the Menagerie's house. He makes a comment about Dagger being a vegetarian, to which Dagger replies with a comment about Zero's paranoia. Plasma steps in, threatening to break their necks (although she wouldn't actually do it!). Zero responds, saying that she's being unfair.