But not always.
I've recently joined the Online Writing Workshop and submitted the first chapter of The Amnesia Door for critiquing. My critique groups are busy with my other manuscript, but I didn't want this new one to stagnate. One of the critiques I got on TAD was that during a conversation between two of the main characters with two of the very minor characters, the reader has no concept of what the minor characters look like.
I had kept these two characters vague because, well, after chapter 2, they're not really in the book any more. I was doing that cut-everything-that's-not-essential bit in my revisions, and I never thought that describing these two soon-to-be-gone characters was something really needed; certainly not "essential."
However, if it makes a reader pause, then it's something I need to consider. Fortunately for me, Tabitha had a great post on her blog about "talking heads," or when characters just talk without showing any body language or action. While my characters do things--one reads a book, the other seems excited about asking questions--I could just as easily add in some more details about who these two minor characters are in between the dialog. Something as simple as having the girl ask a question and then flip her hair would give more sense of who the character is without spending paragraphs or pages describing someone non-essential to the plot.
Here's an example:
"What's everyone's schedule?" Veronica asked.This is about the second or third thing Veronica says. As of this point--and really, as of the whole manuscript--the only thing you find out about Veronica is that she shares one class (Spanish) with the main character and at lunch, she sits with the main character, her friend, and another girl. That's it. There is no other detail about her. But, what if I add to her dialog?
- "What's everyone's schedule?" Veronica asked. She reached into her bookbag--which was really an overlarge designer handbag her father had purchased her during the annual family European excursion--and pulled out her own schedule to compare with the other's.
- Veronica re-adjusted her headband. Belle wondered if the headband was supposed to look vintage or if it really had come from the '80s; either way, it made Veronica look as hopelessly out of date as ever. "What's everyone's schedule?" Veronica asked nervously when she noticed Belle staring at her.
- "What's everyone's schedule?" Veronica asked. She leaned forward, giving the impression of polite curiosity in the others' schedules, but Belle knew that it was all fake and Veronica was only pretending to be nice to them.
So, by adding in a few details with the dialog tags, you can create a unique minor character that gives a more real sense of the story without stopping the plot.