Hargreeves
Splitting up, even a little bit, would probably be faster but Ben decided against that immediately -- his hand still firmly holding onto Klaus'. It probably wasn't practical, but the support was necessary. Ghosts weren't just things that hung around in the back of people's closets when it came to the Hargreeves. They were real and they stuck around. Klaus didn't need any more haunting.
He barely got a glance of what was in the room (a silhouette?) before Klaus was closing the door again and Ben only nodded, his mouth a straight, serious line. "Next," he agreed, but this time, he went to open it. Slow, and the door creaking just a little as he did so. It was dark. Clearly a bedroom for two, with twin beds and toys scattered on the floor. He didn't see anything, but that didn't really mean that there was nothing there. And it wasn't what he was looking for anyway, so he glanced at Klaus before closing it again.
The concept of finding Starklandia behind one of these doors was starting to feel unlikely.