The girl responded positively to his enquiries - which was a good thing, considering the fact that the last girl he tried to help during the Thirteenth Hour reacted in quite the opposite way.

She showed him the device that was in her pocket - this was definitely an Evoker, and not an actual musket. (The modern folk called them guns, but he was too used to the archaic term.)

"This is an Evoker. It is used to summon your Persona." Granted, she probably didn't know what a Persona was, but it was important to establish that the Evoker wasn't an actual musket. "Unfortunately, it cannot do anything more than that - which means it does not fire bullets in the fashion of a -" here there was the slightest of pauses as he remembered to switch gear "-gun."

He glanced around briefly. There were no demons nearby, which was a good thing.

"What you encountered just now is a demon. They are hostile creatures who usually attack on sight - a Persona will fight for you in case you cannot." She... probably cannot. "An Evoker helps people summon their Personas... though I do believe it isn't compulsory - they can be summoned without one."

There was another pause.

"My apologies. I ramble on too long... you are new here, yes? May I know your name, and where you come from?"

Best to establish proper era markers first before he continued talking. (Whoops, his father's genes were showing.)