One of my characters is originally known by his nickname (only for introduction) then known as AJ. Would I write that in my final publishable draft as AJ or A.J. ?? No one ever uses any other name....just the initials A.J. Examples: TJ Smith instead of "Terrance John" JB Walton instead of "John-Boy" AJ Stapleton instead of "Andrew James" "Hi TJ, how are you doing today?" Frank asked.....versus......."Hi T.J., how are you doing today?" Frank asked. Which way is correct - with or without the period after the initials?