[It's a predictable question. All three of them. Even in general the part about those "different places" is plenty confusing; Zero, himself, still feels dumbfounded at times. He's accepted the fact, but it's a bizarre notion to completely wrap his head around.
However, that isn't what matters right now.]
It means what you think it might mean. All of us here. . . we're from varying worlds, and even points in time. Some are here alone, while others have people they know from home along with them. Like the two of you, for example, and myself along with three others from where I'm from.
[All right. Easy question out of the way.]
There are five of them.
[Himself, Yuuki, Ai, Spike, and Damon. He isn't positive, however. There may be a couple more.]
I'm a vampire hunter. In my world, us hunters are capable of sensing the presence of vampires. We're able to do a number of things.
[There's a lie within the truth. He's adjusted, here, to the fact that plenty of people already knew he was a vampire when he first arrived, if only due to having been here before, however it doesn't mean that he advertises it to new people.
. . .And from what he's heard these two talking about, there's absolutely no way he can let them in on there being another side of him. It leaves Zero to be acutely aware of not allowing his fangs to show.]