The Gregory with the black jacket is gregbot btw Explanation: “The Gregbot” scheme 624 made by Vanny. She made him to trick everyone by thinking he’s Gregory and doing things she plans to do with all the animatronics but with Gregbot to blame it on Gregory,it’s also a way to get Cassie to go into the elevator with tricking her with the walke-talkie with her thinking it’s Gregory although it’s actually Gregbot/Vanny.Gregory got lured in by Gregbot and hacked the walk-in talkie directions by telling her where to go,he either failed or succeeded depending on the ending.