Lana Merrion

 was a Decider. She presided over a mission to collect a Marshman, and knew of the Fifth Doctor and the TARDIS. They wanted to study the Marshman to increase their knowledge of them to improve themselves. She believed that Yan Fara planted a Riverfruit in her wardrobe, when an Alzarian spider was found there. She killed a lot of Hiragi by accident in diverting a tidal wave. She understood what she had done and gave herself up to Hiragi law, but the Hiragi council understood why she did it and wanted the event hushed up. (AUDIO: Mistfall)