Emma nodded, but didn't move. She wasn't trying to threaten the girl, but she understood her need for caution, and why this would set off alarms.
She spoke directly in to Lorna's mind.
"I'm a mutant Lorna, a mutant and a telepath, among whatever else I am in life. What I am to you though, right now as we stand here, is no sort of threat whatsoever. I work for a school, an organization, whose goal is to help mutants. I am not here to attempt to collect you or anything, I am here to shop, actually, noticing you was just something that happened."