Solo piece of Abigale.
As the Sky doesn't have very many resources (beside the obvious Wind Power,) Abigale and her troops do less resource gathering and more swooping down on non-Machiman settlements and giving them a hard time. Humans have found it near impossible to re-establish Airports and the like, as almost every flight gets shot down. She frequently looks down on her two sisters (perhaps since she's literally physically above them) and while she tries her hardest to be the most mature, she can't help but fall into the same childish squabbling whenever they interact.
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