"Packie, sweetie, I've missed you so much!"
―Rachel O'Neill

Rachel O'Neill is a minor character in Sibling Rivalries and Sibling Rivalries: The Next Chapter. She is the maternal grandmother of the McReary siblings who was only mentioned in the Season 5 comic "Uncle Cameron Moves In", on the family tree that Packie made. She later appeared in "ApRiL fOoLs DaY: wIsCoNsIn StYlE!" at the end of the season, though he did not make her first canon appearance in the TNC comic "River Rock Rivalry".