Y/N O’Neill joins SG-1 under classified circumstances shortly after the early Abydos mission. Assigned by General Hammond and approved by Jack O’Neill, her arrival disrupts the team’s established dynamic. While the rest of SG-1 adjusts to the sudden addition, tensions begin to form—especially with Daniel Jackson, who is still emotionally preoccupied with the loss of Sha’re. As missions begin, professional boundaries, loyalty, and unresolved emotions slowly blur within the team.