Dion is an attacking midfielder who likes to find space behind the striker in which to operate. He can play deeper, wide and enjoys getting on the ball as a playmaker. He's also built up a reputation as a set piece specialist. Dion made his Under-18 debut and claimed an assist in the final game of the 2016/17 season whilst still a schoolboy.
Dion made his Manchester United Under-23 debut in January 2019 and scored his first professional goal for the club in March 2019 for the Under-18 side.
Dion was released by Manchester United at the end of the 2019/20 season.