Matt Tait talks about Twitter and its main characters here[0]. I just block all these 'characters' so I never have to see them in my feed. And it's not just a handful, I block ~300 accounts which in my eyes are all bad faith actors / troublemakers who are subtly trolling Twitter because they have a large following.
[0] https://www.pwnallthethings.com/p/twitter-was-special-but-it...
I thought "main character" was a literary term? As in the "main character" of a book or story. Does it mean something different on twitter?
Although we are each usually the 'main character' of our own story, we typically know that we are not "the main character" of the world broadly. Some people act in ways that suggest they may not understand the difference. People refer to them as having "main character syndrome."
I think usage has drifted since then to "the person everyone is talking about."
However, it is true that the manager often represents the team in meetings. To the other people in those meetings, the manager may be the only person they know on the team.
An extreme version of this: outside a company, the CEO may be the only person the average person has heard of. Who do you know who works for Tesla, besides Musk?
Or consider the inventions attributed to Edison. Could you name anyone else who worked in his research labs?