Answer: Vince
At the dance in Grease, Marty hooks up with Vince Fontaine, the radio DJ who hosts the National Bandstand dance contest. Vince is known for his smooth talking and slick style, and he takes a liking to Marty's bubbly personality. Interestingly, the actor who played Vince, Edd Byrnes, was actually a popular TV star at the time, known for his role on the show 77 Sunset Strip. Byrnes was brought in to add some star power to the movie, and his character became a memorable part of the Grease story.