Once they're all ready to go, he happily dives in beside her. He moves quickly---he'd clearly trained quite a bit for that hostage rescue exercise. But today he's having fun. He twists every which way, looks all around, and even does his best attempt at a fish impression, flapping his bent-elbow 'fins' before making another graceful twist in the water. It's like he thinks he's a merman.

The chill disappears after that minute of intense swimming, and when he's sure that she's okay he accompanies her into the wider waters, hand tight around his wand.

They soon have their first wildlife encounter: it's some kind of mutated fish with too-sharp teeth. Cedric casts a warning blast of hot water at it, and it races off, but he stops and makes a surprised face to Ellie.