The person in the helicopter in The Walking Dead is Jadis/Anne.

In The Walking Dead, the mysterious person in the helicopter is revealed to be Jadis, also known as Anne. Jadis is the leader of a group called the Scavengers, who live in a junkyard and have a unique way of speaking. She is first introduced in Season 7 and plays a significant role in the series. Jadis is known for her cunning and manipulative nature, often making deals with other groups for her own benefit. She is also shown to have a connection with the helicopter group, as she is seen communicating with them and even being rescued by them at one point. The exact nature of her relationship with the helicopter group is not fully explained in the show, leaving fans with many questions and theories. However, it is clear that Jadis/Anne has a complex and intriguing role in The Walking Dead universe.