So the character I have chosen is a re-imagining of the most feared
alien from X-Com - The Chryssalid.
The Chryssalids one of the main alien terror species in the PC game 'X-COM: UFO Defense'. They are roughly humanoid in size, with an insect-like exoskeleton and menacing claws. They strike fear into X-Com soldiers in a major way. The reason? They turn civilians into zombies by injecting a parasitical Chyssalid spore. Since the Chryssalids attack in densely populated civilian zones, the task of the X-Com commander becomes perilous. Every civilian is a potential zombie recruit, but it is much worse than that. A new Chryssalid will emerge from a zombie in a frighteningly short space of time. It is entirely possible for an X-Com commander to find his squad transformed into a horde of Chryssalids, with no hope of salvation.
The task is to re-imagine the Chryssalid. How can it's parasitical nature be portrayed? Perhaps it has some human genetic material combined with its own? There could be a hint of some human features mixed with something horribly alien. For added effect, the creature can be portrayed shedding its human-zombie host.
Here are some informational links: