Sudden Storm (Tales of the Citadel Book 21)

Vexaniali has spent her life in solitude, finding ways to entertain herself on an empty world that has become her prison. She was ordered to keep anyone from landing, but it was just a make-work job to keep her out of the way.

Burn arrives and offers her a chance to use her skills on a variety of worlds under the aegis of the Citadel Arcani.

Moving a cure around a world using her mastery of air is time consuming and tiring but not difficult. It is a good start, and when Burn offers himself to top up her flagging energies, how could she refuse?