Nope the ghost doesn't have any sort of plug and plus the ghost is not really a robot it's a living form that can mess around with tec... Plus the guardian could just click the button to make the ghost go away *enter troll face here*
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But it's not organic, it's a sentient robot powered by the light. The only trait that ghost has in common with an organic lifeform is it's sentience, but it is in no way a natural lifeform. Just this crazy fact makes Ghost on a whole new level of technology compared to Cortana.