Shannon is a woman Gru went on a date with. At the restaurant, she began talking about how she didn't like people when they were being fake. Once she spotted that Gru was wearing a toupee, she threatened to pull it off his head and show everyone he was trying to hide he was bald.
Shannon was knocked out by a moose tranquilizer fired by Lucy Wilde when she overheard the confrontation and decided to save Gru from embarrassment.