Benjamin was mildly impressed with the magic show. Some of the tricks completely ruined since he knew how they were done. The lady in the box was the simplest. Just get a contourtionist to huddle inside the box. Overall he wasn't dissapointed but he didn't need to come. But then Prospero's final trick set him in edge. He was filling the audience with smoke. He wasn't so alright with that but then the audience all vanished except for... The Mafia. So it was the Vongola candidates, himself of course, some kid Daisuke was with and some girl he didn't know. Taking stock, he took a step back. He was towards the back of the group and kept everyone in view. He wouldn't be so paranoid if it weren't for the fact that there were two strangers associated with the mafia present, and that Prospero knew who they were. He didn't have his sword but he had a pocket knife. He was effectively prepared to fight.
What he didn't realize was that he had an eye on Naoto first. He'd detected danger and the 'boss' was his first concern. It didn't trail through his mind until shortly after the fact. But he kept silent and focused. He still felt threatened and didn't want anything to happen to these people he'd somehow joined a mafia family with. He gave a nod towards the girl while keeping eyes on Naoto on the chance he'd see and look towards her, but tried to keep focus on everything.