She's a textbook grandiose narcissist. She genuinely believes she can fool people or make them think the things she wants them to. This leads to the type of crazy decisions like staging a car chase through New York, wearing a ball gown in a grubby cinema in Jamaica and sending her husband to London for 24 hours. It also explains why she was happy to strike up multi-million deals with media giants in exchange for very poorly executed, middling content.
There was some discussion upthread about not diagnosing someone you never met. However there are plenty of public figures you've never met but you simply know from their media footprint that they are "a certain way". Never met Justin Timberlake but convinced he's a sleazy twat. Never met Leonardo DiCaprio but pretty certain he's the same way. Never met Meghan but based on all her actions, pretty certain she displays lots of narcissistic red flags, not least being that there's already a significantly higher proportion of narcs in jobs that require you to be the centre of attention or in front of a camera. Actress and influencer are the two career choices with a huge percentage of narcs and she has done both.
-She's obsessed with high status people and used her wedding to invite everyone she could power network with. She didn't invite a single childhood friend or relative.
-She drops people from her life whenever they are no longer useful to her, including her own father. And her so-called best friend Jessica Mulroney who disappeared entirely from her life.
-She isolated her partner from his family and friends. The RF is highly dysfunctional so it's understandable why Harry might need space, especially from his parent. But it's extremely strange to cut contact with all friends as well. He had lots of trusted mates from his time in London, what happened to them? People who go NC with their family usually value friendships even more and go to extremes to preserve that bond.
-She chose a very personal name for her child which wasn't approved by the Queen but which she knows will bestow "high status and power" on her child later in life. She loves the idea of Lilibet telling people who she was named after, and didn't give a fuck about what the Queen thought about that while she was still alive.
-She consistently leaks info to people like Omid Scobie who is an odious bottom feeding "journalist". The old saying, you can tell a lot about someone by the company they keep applies here.
-She plays the victim card whenever she feels she's losing support or sympathy. Another common tactic of narcs, usually covert narcissistic mothers to turn people's sympathy towards them by creating situations where they are the victim.
However at the end of the day, narcs aren't sociopaths. They can be tremendously fun and generous when they want to. Most narcs have no problems sustaining real friendships and of course those friends will vouch for their charm and authenticity. Meghan probably has a great life in LA and whichever transient group of famous people she wants to associate with right now. Remains to be seen where Harry fits into all this over the coming years.