"Neville's," he says, and claps a hand on Neville's back.

"Ah huh." She regards them for a few long moments. "Have you asked a prefect for help?"

"No," Ron says.  "We're checking all the compartments."

"There's spells to find stuff faster. Prefects should know them."

"Well.  Guess we should head to the front car, then."

"I think that's where prefects usually are." She shrugs. "Good luck, I guess."

She guesses.  Okay.  "Well, let's get going, then," he says, and slides the compartment door shut.

She waves to Serpens a bit, then, "Okay, so to the front?"

"Guess so," he says, and sets off.

She follows along.