In the final chapter of Chapterhouse Dune, a mysterious old man and woman calling themselves Daniel and Marty observe the escape of the no-ship from Chapterhouse. They speak of themselves as if they are Face Dancers, the shapeshifting minions of the Tleilaxu:
"They had a Tleilaxu Master, too," Marty said. "I saw him when they went under the net. I would have so liked to study another Master."
"Don't see why. Always whistling at us, always making it necessary to stomp them down. I don't like treating Masters that way and you know it! If it weren't for them . . ."
"They're not gods, Daniel."
"Neither are we."
"I still think you let them escape."
"What would you have said to the Master, anyway?" Daniel asked.
"I was going to joke when he asked who we were. They always ask that. I was going to say: 'What did you expect, God Himself with a flowing beard?' "
Daniel chuckled. "That would've been funny. They have such a hard time accepting that Face Dancers can be independent of them."
"I don't see why. It's a natural consequence. They gave us the power to absorb the memories and experiences of other people. Gather enough of those and . . ."
"It's personas we take, Marty."
"Whatever. The Masters should've known we would gather enough of them one day to make our own decisions about our own future."
They hint that they observe and are familiar with various groups in the universe, and allude to their desire to capture and study the passengers of the no-ship:
Marty called after him: "Gather up enough people and you get a big ball of knowledge, Daniel! ... And those Bene Gesserit in that ship! ... Ever notice how alienated they feel when we peek at them?"
"Not to mention Mentats," he said. "There were two of them on that ship — both gholas. You want to play with them?"
"You know what you let get away, Daniel?" she demanded, coming up beside him. "That Master had a nullentropy tube in his chest. Full of ghola cells, too!"
"I saw it."
"That's why you let them get away!"
"Didn't let them ... Gholas. He's welcome to them."
Earlier, Duncan Idaho had seen the observers in a vision, and came to his own conclusions:
Reassuring faces. That thought aroused Idaho's suspicions because now he recognized the familiarity. They looked somewhat like Face Dancers, even to the pug noses ... And if they were Face Dancers, they were not Scytale's Face Dancers. Those two people behind the shimmering net belonged to no one but themselves.
With the subsequent death of Frank Herbert in 1986, the identities, motives and intentions of Daniel and Marty were left to speculation.
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