Ruin Symbiote

Ruin's host is a war amputee who suffers from post traumatic stress disorder and Phantom pain disorder (a neurological condition where an amputee suffers pain or believes to continue feel sensation in place of the missing part of the body) Fear, psycholigcal regression  and the affected neuro transmitter's heavily confused the symbiote even though it understood that it's host's left arm was missing it was unable to form an effective replacement thus resulting in over compensation and bizarre formations (based on past species encounters) in place of the host's left arm. 

Over time Ruin was able to master her symbiote and form an effective left arm however she came to prefer alternative limbs that her symbiote could form while performing their vigilante activities