Umbral Mortificator (villain)
An assassin more made then born. In the Umbral realms assassins are more thought of as tools then of living beings. Originally an altered member of a slave race brought up and trained as an assassin from birth. Cybernetically modified when fully grown to the point of being more machine then "man".
As he did a lot of work for the Apostate both before and during the renounciation of the faith, he more or less had to join him in his refuge on earth. At least until such a time where he can return with the good favor of the Umbral theocracy...or the power to lay it beneath his feet.