There's something vaguely amusing about watching oranges being distributed in such a manner. Tech may not be able to sense the same things Vader does, but the gratitude is evident enough in their body language as the spirits receive the offered citrus.

For as careful as he's being, Tech's still unable to be as aware of the potential threats as a Sith lord can be. The very nature of the spirits themselves makes it difficult to keep track of them as it is. He glances at Vader when the other speaks up again, on his guard out of reflex even as he looks for the approaching spirit, something that becomes quite easy to spot soon enough. With his hands full it keeps him from going out of reflex for his weapons, not that he figures they'd be of any use here.