As I mentioned early on, as a psychology student, I am ethically trained not to offer diagnoses of people who I have not myself treated. I can notice tendencies or have suspicions based on video clips and social media communications, but those alone are not enough to meet the diagnostic criteria.
I don’t know if narcissism is the best choice to explain Letecia’s behaviors. There are several other solid possibilities that might also account for them well.
However, in reference to questions about narcissism asked here, I *will* offer some general info about narcissistic tendencies.
A diagnosed narcissist uses what some call a “narcissistic supply.” In short, it means a narcissist feels insecure and fragile and they compensate for that by gathering up people, jobs, accomplishments, maybe even “talking points” that make them feel important. They must constantly have a supply, so if any of those items (people or roles or story lines etc.) at some point no longer validate and affirm and applaud them, a diagnosed narcissist is known to cut ties with the old “supply” and find someone or something new to replace it.
This is why some narcissists are able to go a long way (some probably their entire lives) without anyone catching on to their patterns. They woo one person or employer, and then when that relationship breaks down, they quickly move on to discrediting and discarding them to wooing another.