It’s often a good idea to introduce a new character with enough physical description for your readers to picture him or her. As with describing your settings, all you need are a few concrete, idiomatic details to jump-start your readers’ imaginations (“A good-looking man in his fifties,” for instance, is too vague to be interesting). But when it comes to your characters’ personalities, it’s much more engaging to have these emerge from character action, reaction, interior monologue, and dialogue than from description.
