Haha, the CASIE isn't a weapon in the conventional sense! Just a cranial implant that helps him out in social situations with info overlaid on his HUD – provides a brief psychological profile of the person it's analyzing, and has a secondary functionality that uses chemical influencers to aid in persuasion. Pheromones and stuff. Video game science, just roll with it. :')

He won't be aggressive unless he has reason to believe that that'll get him the answers he's looking for (i.e. if his brain computer tells him that she buckles easily under pressure.) But there's also precedence for people in his canon being able to tell when someone is trying to use a CASIE mod to manipulate them and, as you can imagine, it's pretty much never something that people are happy about. Since the attendant's not human (or necessarily even human-like) it's possible that it just won't work well on her – either giving him bad advice on how to handle the conversation, or maybe she'll react badly to the chemical influencers if he uses those, etc.

So could come back down to these choices in the end, just let me know if this info changes anything!

Also: probably just horror/sci-fi elements, no need to go super-ham, Hostel levels of horror or anything. Sci-fi mostly because technology is something that he is familiar with or will generally have an opinion about. If it gets this guy to experience An Emotion, then it is a success!!