Sandra Tregart was the daughter of the baron of Thunder ville, in Indiana.

She discovered an airfield with a working biplane and learned how to fly it, using alcohol for fuel; she used the plane to fly over other villes, demanding tribute to prevent them from being bombed. She eventually created a working plane of her own, but she never got to capitalize on it, as the companions found out what she was doing and put an end to it, destroying her notes as well so no one else can duplicate it. Ryan lured her into an area with screamwings, a flock of which distracted her long enough for him to shoot her; she crashed into the forest and was later burned alive by Baron Jeffers, a man whose ville she destroyed. (Sky Raider)

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