Re: Severus, Caitlyn
Her eyes narrowed briefly before she made an attempt to school her expression. Right, best not to be obvious about anything.
So she attempted to feign casualness, shoulders rolling in a shrug. "Not waiting for anyone in particular. Just trying to spot any mudbloods and warn them off before they foul up this bit of train."
It wasn't her best comeback - but she thought it would suffice.