Slytherin Cord's eyes quickly glanced at the masked figure from head to toe numerous times.
This was definitely not his rabbit!
The first thing that he noticed was the mask.
From all his research, the Ghostly prince had 11 masks that he wore for different occasions, places and intervals.
And none of them looked like the mask that this fake was wearing.
Of course, he also didn't know that the person underneath the mask was Mr. Death..... because Mr. Death also had different masks that he used whenever he went out or took his role as an assassin.
So for Slytherin, since these masks didn't match his rabbit's own, he was sure that the person was a fake.
In addition to that, the fake's body and way of walking were way different than that of his rabbit.
He had been studying his rabbit for years now, so even without seeing his rabbit's face... the slightest difference would make him know that he was looking at a fake.