Marsalla

Marsalla was a Jukstan female. As a child, she was taken from her world by Krem-ling and became his servant for many years, witnessing him feed off his victims' psychic energy and possessing their bodies. On Crellium, she aided in his plan to take over the Communal Will of the Yulians, planting the flowers which would transmit the psychic energy to the emissaries of Drakka and revive them. Before his current body died, he told her that the Fourth Doctor and Sarah Jane Smith were on their way to Crellium from Yula. When they arrived, she told them about herself, Krem-ling and the plans they had made. The Doctor deduced Krem-ling's identity and convinced Marsalla to stop him by possessing his body before his return from Yula. She activated an explosive device which destroyed herself and the emissaries, but her spirit somehow survived, becming part of the Communal Will. (PROSE: The Vampires of Crellium)