Technically all things in the cursed castle are undead, but those that inhabit the armory are more noticeably so, and are thus called by the according name. The undead can be identified as walking masses of rot with all manner of strange things sticking out of them, most likely weapons from the armory they inhabit. Though they are warlike in nature, they have learned that an all-out offensive tactic is not the best taken against the other groups, especially since that normally results in an alliance of everyone versus undead. The undead are rightfully more geared towards physical prowess, as they take damage without so much as flinching, their nerves no longer feeling pain.