Jadis is a relatively newcomer to The Walking Dead world. But she definitely made an impression when she appeared in season 7’s “New Best Friends”. Rick passed her test by killing Winslow and coming up with the guns she wanted for The Scavengers.
But then she and The Scavengers pulled a double cross on Rick when Negan showed up at Alexandria in the season 7 finale. That proved that Jadis is going to do whatever she thinks is best for her people and she’s always going to take the best deal for them. The Scavengers retreated when things took a turn in Alexandria so she’s clearly not loyal to Negan either. Loyalty to anyone but her own people isn’t something she really cares about.
As the communities form alliances and choose sides for All Out War it remains to be seen what side The Scavengers will end up on. Or whether or not they will be able to work with whatever group comes out on top after the war is over.
What The Future Holds For Jadis
Pollyanna McIntosh had this to say about what she wants for Jadis after All Out War:
"“Oh, if Jadis could take out Negan, wouldn’t that be a joy for everyone? I mean that’s not the case clearly because lots of people want to see him survive. He’s really fun and good value. But if she could, after some time, take Negan out, that would make me very happy.” “I’d like to see her combine with Alexandria. I’d like to see both groups thrive together, but the conflict as well is so much fun. “"
Does that mean that Jadis ultimately will double cross Negan the way that she double crossed Rick? Would Rick even trust her to trade with Alexandria or join the community alliance? Probably not. The Scavengers aren’t really team players, so it’s unlikely that they’re going to join ranks with whoever wins the war. But Jadis is willing to adapt to ensure the survival of her people, so only time will tell how she will adapt and change to survive in the new hierarchy of communities that comes after the war.