Silva is slightly surprised that Henry noticed her so quickly. Sure, she wasn't exactly trying to be stealthy, but Henry seemed preoccupied enough to not notice her till she was right up with him.

In any case, Silva steps into his view before stopping. Her hands are tucked into the pockets of her jeans, thumbs out. A non-threatening pose. She didn't want to freak him out or anything.

Just somebody wondering what a spirit is doing wandering out of a graveyard. Doesn't happen often. Most stay in the graveyard.