The one. That gives Firo a big old clue--he couldn't mean the key player here, right? Either way, now he knows it's a person they're going for and not anything like supplies. He may be slow, but he's still sure that they're not going to be doing much guarding of anything.

A smile flickers onto his face, only to fade immediately when Roland finishes speaking. "What, so you could do it alone? I couldn't leave you like that--if you're gonna get in trouble, you need me there." What else could he have done?

But back to business. He watches the area out of the corner of his eyes, trying to stay vigilant without really looking it, just like he would when watching the casino. "What're we doin'? We get to this guy and then what?"

There are probably only so many ways this could go, but there are many actions that could lead to the end result. Firo already invited himself along; he doesn't want to get in the way.