“I assume, Cameron has explained exactly who she is and where she is from?” John Henry asked.
“I did,” Cameron replied.
“That makes it simpler,” John Henry smiled. Inara's jaw dropped. She knew that the being in front of her was a machine. Just like Cameron. But still, this John Henry or Henry Johns as both Zoe and Mal knew him looked... human. Even more so than Cameron.
Inara's Companion training could read the machine's body language just like a real persons. Her training told Inara that John Henry was both happy and slightly nervous at the same time. Cameron was always a blank slate to the former Companion. Not so, John Henry.
-- Discovery - Chapter 5 by Briglad