Seri of the Sands

Seri was a bastard child, and controls the sands of Freesia, having been given to an old lady (a seer in disguise) by her mother, the current Queen. Raised by the seer in the ways of a sand controller, Seri now protects their desert kingdom (and, ultimately, her mother).

She doesn't know who exactly her mother is, but knows she is an important figure of power.