A resident of the planet Garissa, Mzu developed a super-weapon known as the Neutronium Alchemist which was capable of making a star go nova or creating a black hole within the star, pulling in all fissionable material and extinguishing said star. Whilst attempting to deploy the weapon during a war with the planet Omuta, Mzu's ship was disabled by an Omutan attack. The surface of her planet was subsequently wrecked by 15 high-yield antimatter planet-buster bombs which killed the entire population. Mzu ended up in Tranquillity; she agreed to remain there under observation by various intelligence agencies so that the secret of the Alchemist would not become generally available. During the course of the trilogy Mzu escapes Tranquillity and attempts to retrieve the weapon so that it can be used on Omuta; instead she helps Joshua Calvert use the device to ignite a gas giant so as to facilitate their escape from ships under the control of the possessed.