A non-corporeal energy-based species which inhabits inhabit the coronal haloes of O-spectra
stars and has developed a space faring civilisation, travelling the cosmos in field-enclosure ships. When encountering corporeal species, they usually use encounter suits aka Simulacrons which are tailored to look like a divine or idealised version of the species they interact with. When meeting humans, they look like golden greek gods, but act very mundanely.
Mizzarett have a commercial rivality with the Lamberj species. They are known to have colonies on Kimmonoshek.
Source: Isaac Asimov, Buy Jupiter!