Well show not tell works better. Obviously if you're writing from character X's POV there is some description like that involved the first time they see character Y, especially if they don't know their name. But I hate the whole info dump introduction some people do.
It should flow naturally. For example the first time they meet Ducky it may be something like ...
Joe saw an older man in a tweed jacket and corduroy trousers walking along the side of the road. He pulled over to see if he wanted to join them.
The man turned towards them when he saw the truck coming and tipped his hat. "Well, hello gentlemen. I was beginning to think I was the only survivor left in this state. You're not from around here though." He put his hand through the window to shake Joe's. "My name is Dr. Mallard."
"With an accent like that you're not from around here either," Joe said with a smile. "Scotland?"
"Not for about thirty years now, young man," he said jovially. "I left when I graduated medical school."