Amrigdus Salazar originally baring the last name Maderka was handed to the Salazars through their Necropolien outpost as a subject from the dimension but she quickly proved herself useful as something more and turns out she was’t just a Nercrolien either...

but she was only bitting her time to be able to spread her infectious tendrils through the unknowing 4th dimension being a slave to her instincts at the time.

but she never asked for any of this as the more humans she consumes or rather takes over the more human she herself becomes eventually gaining enough awareness to fight her own nature. at this stage she is affective at the moral level of a psychopath.