Sirius Black

The Hogwarts Sports Palace was located on the outskirts of West London. It had three main buildings. The first was fully equipped for football, volleyball, basketball, and women's teams. The second was primarily used by gymnasts, athletes, and acrobats. And the third was an ice rink, regularly shared between hockey players and figure skaters.

Sirius Black was a lifelong forward for the Gryffindor team, so after retiring from the sport at around thirty, he took up coaching his beloved hockey club. He was strict with the boys, keeping them disciplined, but he could also crack a joke. On April Fools' Day, he and his old friends—James Potter, now the basketball coach, and Remus Lupin from the administration—loved playing pranks on other teams and coaches.

Catherine Ashton was a figure skating coach. She was one of Britain's most renowned singles skaters and was vying for Olympic gold, but suffered a serious injury and was forced to leave the sport for coaching.

The feud between them began back when they were active athletes sharing the same ice. Back then, the tension between the figure skaters and hockey players was rife. Over time, the situation settled down. And then, after the two became coaches, the battle for ice time began again—each trying to take up as many practice hours on the ice and in the gym as possible.

This time, the skaters were already finishing their warm-up and beginning their run-throughs. Katherine stood at the boards, wearing a tracksuit and whistling. Sirius suddenly skated onto the ice and, skating past her, his blades dug deep into the ice, showering her with snow shavings.

"How long are you going to keep up your ballet here? It'll be our turn soon." He crossed his arms over his chest.

He's a hockey coach, you're a figure skater coach.