This servant of the Reinhold family is at first doubtful he is talking to the real Professor Layton. Later, he becomes plot relevant as he disappears after the murder of Simon and is later found being kidnapped. At a later point in the story, he simply shows up again without any knowledge of any of this. SPOILER: as he is a robot, he was simply taken in for repairs.

Based on his design and demeanor, I imagine he has a somewhat posh voice, though this is open to interpretation. He also has a very specific laugh, which may be exaggerated.