Murphy

Murphy is a man of mysteries and many special abilities.  Some of his abilities include mind reading, empathic abilities, and many others that he has yet to divulge. He was born in Spain.  No one is fully sure what he's capable of, but as a mentor to both Laura and Ricky in their younger years, he helped them hone their own abilities.  
No one knows what his real name is.  Laura has always known him as Murphy.  Ricky knew him as Professor Montenegro... Steven knows him as something else, but won't say. 

He sees Laura as a daughter, and it's clear he feels a special connection to Ricky, though he won't divulge any information to Laura.  Laura only found out about Murphy's time as Ricky's professor when Ricky "met" Murphy for the first time after his escape from Camila's house.

Although Laura can feel emotions, and Ricky can read body language, Murphy is able to hide a lot from the two of them through disciplined mental abilities. He can shield his emotions from Laura and can tell when she's trying to probe them.