Flags of Our Foul-Ups: Mags will tell the player that the squad needs to improve in the shooting range and at throwing grenades. When asked to line the squad up there will be 3 Guns checks when talking to her, (25), (35) and (45). After finishing the firing range the player will need to talk to her again to improve their grenade skills with 3 Explosives checks (25), (35) and (45). After that talk to her again about the squad to complete the quest.
If the player is taking O'Hanrahan's advice and convincing the squad to work together, the player will need to convince her to work better with the squad with a Speech check (40).
If O'Hanrahan or her own advice is followed during the quest Flags of Our Foul-Ups and Caesar's Legion is not victorious, she is promoted to sergeant after the Second Battle of Hoover Dam and the Misfits will serve with distinction in the NCR for years to come.
If the Courier kills President Kimball in the Legion quest Arizona Killer, donning NCR armor and talking to her will cause her to comment that the Courier is lucky to be walking around the camp after what they did to the President.