Yes the first thing Nigel did notice was that slightly familiar guy walking by and nod at him. Nigel nodded back of course. He had manners. He had no idea if they guy was important or not. Well looks like he is only standing at the head of the table.

Like a body guard or something. Cool if true. Nigel would probably have thought about it more. But Mo was the next to sit down. When Nigel was not doing stupid things or talking. He was very observant. So of course he realized Mo did not come back to the Prefect compartment and probably did not want to talk about whatever it was right now.

His questions were excellent though. "He does look a little familiar. A robot would be cool. Maybe a bodyguard robot"

Now that would be awesome.