Ouida

Lady Ouida was a member of 'The Committee of Three', together with Lord Provost Tepesh and Arata. As members of the Arcalian House, Tepesh and Ouida were Gallifreyan, and were known to Rassilon personally. However, they were also Vampires (secretly, presumably) and plotted against Rassilon. It is implied that they killed the third member of the Committee of Three before meeting with the Great Mother and Cassandra from the Sisterhood of Karn, plotting to destroy Rassilon's Foundry. They were killed by the automated sterilisation of the Foundry. (BFA: Zagreus)