Science Fiction?

The Chameleon Necklace ran out of mana just in time. The spell deactivated the moment we got back to my room. 

"What just happened?"

"Huh?"

"Even when we bumped into people, they weren't bothered by it! It's as if we didn't exist! Just what the...?!"

Instead of explaining everything to him and wasting my breath, I just showed him the Chameleon Necklace. I was hoping his Akashic Eye would do the explaining for me. 

"Woah! That is-"

"Absurd?"

"Yes! Who made that thing?"

"Someone named Ashton. Weird old dude."

Luffy seemed confused and just responded with an "Okay" as I tucked the necklace underneath my shirt.

Now, how to interrogate these two. The scout is on the floor with the invisible teleporter is on my bed. Though I can't see him, the bed's foam was clearly marking his body shape, and I'm pretty sure Luffy can see through that invisibility. But none of that is helpful.