An Allazei is a creature that is human at birth but when they reach a certain age and other conditions are met, they change into half-human half-beast hybrids, the conditions and beast that the Allazei transforms into depends on the nature of the Allazei. When an Allazei transforms, another entity inside of the Allazei takes over and the Allazei remembers nothing from when they were transformed, but there are ways to get rid of the 'alter ego' and gain the ability to transform at will, but it is very difficult to do and requires alot of strength.