The Smiling Assassin is a so-called friend who is really an enemy whose main weapons are inconsistency and unpredictability. They use rumour to undermine colleagues and adopt a passive-aggressive, indirect, dishonest style of dealing with people and issues. Sound familiar? What to do?
https://www.linkedin.com/pulse/smiling-assassin-do-you-work-functional-narcissist-samantha-young/
Your Journey to Healing Starts Here 