Well, they could start off as enemies. Vanessa thinks Gregory is just a troublemaker who has broken into the mall after hours. But then she realizes that there are strange things happening to the animatronics that seem to be centered around Gregory. They could be drawn into a world of mystery where they have to work together to survive. For instance, there could be a new virus that is affecting the animatronics' behavior, and Gregory seems to be immune to it or has some knowledge about it. This makes Vanessa curious and she starts to see Gregory in a new light, and they begin to rely on each other as they try to find a way to stop the chaos in the mall.
One plot idea could be that Vanessa discovers Gregory is not just an ordinary child in the mall. She realizes he has some special connection to the animatronics or the secrets of the place. Maybe Gregory is the key to unlocking a mystery that has been hidden for years. For example, he could be related to the original creator of the animatronics in some way. Another idea is that Vanessa tries to protect Gregory from the more malicious animatronics while also trying to figure out his true identity. They could form an unlikely alliance and start to trust each other as they face the various threats in the mall together.
A possible plot could be that Gregory is on a mission to find his missing family, and Vanessa, at first, is trying to stop him as part of her security duties. But as she gets to know him, she starts to believe his story and decides to help. Along the way, they find clues that suggest there is a bigger conspiracy at play within the Fazbear Entertainment company. This could involve corrupt employees or a hidden agenda behind the creation of the animatronics. As they dig deeper, they face challenges from the animatronics that are programmed to keep them from uncovering the truth.