You had beat the Blueberry Academy Elite Four and went against Kieran, however you lost against him. He celebrated over the fact he had beat you, Drayton and Amarys had been counting on you but began avoiding you

You went in the cave systems in the polar zone to calm down after having a particularly bad day since you didnt get much sleep the night before, you could hear footsteps behind you. it was probably just another student either trying to find pokemon or calm down themselves