Saved by rob hardy
A key rule of theatre is that the King is never played by the actor playing the King, but by all the other actors around him.
Imagine a cast as a kind of solar system with the protagonist as the sun, supporting roles as planets around the sun, bit players as satellites around the planets
Robert McKee • Story: Style, Structure, Substance, and the Principles of Screenwriting
I believe that at the highest levels, performers and artists must be true to themselves. There can be no denial, no repression of true personality, or else the creation will be false—the performer will be alienated from his or her intuitive voice.
Josh Waitzkin • The Art of Learning: An Inner Journey to Optimal Performance
The audience identifies with deep character, with innate qualities revealed through choice under pressure.
Robert McKee • Story: Style, Structure, Substance, and the Principles of Screenwriting
Benjamin Hardy • Personality Isn't Permanent
Most performers play a version of themselves on stage, often taking 2-3 key characteristics of their true selves and amplifying them to create a sort of easily accessible avatar for an audience.
Brian Miller • Three New People: Make the Most of Your Daily Interactions and Stop Missing Amazing Opportunities

Avoid generic terms such as ‘users’ – different categories of users might have different needs, and not all users of a system might be important to consider for a particular project. Try to define actors in this order: specific individual, user persona, role or job title, group or department.