Lily frowns and shoves her things into her robes pockets (she had gotten dressed ahead of time so she wouldn't have to change later), then follows the black head of hair.
"That's the same boy who dropped his glasses earlier," she says aloud, then unceremoniously opens the compartment door where James, Peter, Remus, and Sirius are sitting.
She turns to James with a raised eyebrow and a glare, just like her mum does when she's mad at her da. "You pranked a chocolate frog that my friend Severus opened, and now he's going to be miserable all day. I think you ought to apologize," she states clearly, lightening up on the glare a bit. He
is an eleven-year-old boy, after all.