The Crimson Squad was an elite group intended to surpass the Crusaders in Final Fantasy X-2. The best members of the squad would then be assigned leaderships of various groups of Crusaders all across Spira. Notable candidates for the squad include Nooj, Baralai, and Gippal, with Paine as the group's recorder.
The Crimson Squad dissolved after an incident in the Den of Woe, which resulted in the death of all the candidates, except for the previous four mentioned. The player is able to uncover the incident by gathering the recordings made by Paine, called "Crimson Spheres", from when she was the group's recorder. If the player succeeds in collecting all 10 spheres, they will be able to enter the Den of Woe and uncover even more of Paine's past and the truth of what happened.