In all the novels, mangas or similar, when a powerful character has a strange feeling, it somehow means something, and apparently in this world this rule applied or at least that was what Andrew thought when he listened to Oliver.
After Nadila's carriage left, followed by Marie and two other Shadow members, Oliver spoke again, "Young master, from now on it would be good if Miss Aki accompanied you at all times, to avoid any troublesome situation".
Although Andrew was uncomfortable allowing his wife to protect him, he had no other choice. Although he had techniques to protect himself, that only applied when he was prepared, but if it was a sneak attack he wouldn't be able to react, so having people like Oliver or Aki by his side was better for safety.
Meanwhile, in the carriage, Nadila was sitting opposite a middle-aged man, neatly dressed, with a well-groomed black mustache the same color as his hair, and a monocle over his right eye.