Talk to Krum.

You walk over to Krum's table. When he hears footsteps, he looks up with a scowl, which vanishes when he sees you.

"Harry", he says. "It is good to see you. Sit down."

You sit opposite the Triwizard Champion, and Krum continues.

"I heard about your performance at the First Task", he says, flashing you a grin. "People said you fly as well as I do."

"Oh no", you reply, shaking your head. "I saw you at the Quidditch World Cup. I could never be that good!"

"You were there? I am happy that someone as famous as you could see that performance."

You speak for a few more minutes, until Krum is interrupted again by more admirers.

"I am sick of all your Hogwarts students asking me for autographs", he says, his scowl returned. "I think I may return to my ship."

Krum begins to pack up his things, then turns to you.

"Do you want to come to our ship?" he asks. "I can give you a tour."