If you read this post, you might have noticed that I stopped putting the letters in quotations after announcing that I consider the letter "Y" to be a female. I'm sure this bothered some grammar nazis, but I didn't do it blindly! I chose to remove the quotations at that point because it also revealed that the alphabet, at least in that context, are characters (not the phonetic kind). Last time I checked, character names don't go in quotes (usually).