In description of your script you have written: "Users can create author profile if the quote author not present. And each author has dedicated profile page."

How can I customize the author's profile view on the site using the example of Merlin Monroe?
On your demo site, this page doesn't work at all: https://demo.corejoomla.com/quotes/celebrities.html?id=5:marilyn-monroe&catid=119
Tell me how to set up author profile in Control Panel of Joomla for displaying  it on the website with a description of the author: photo, date of birth and biography?

If this is not possible, then in this case the description of your script does not correspond to reality.