For starters, it is worth mentioning what The Answer is. The Answer is a special episode of Persona 3 that comes in the epilogue of Persona 3 FES on PS2. This is the only version of the game to contain this special episode as the PSP version did not include it for whatever reason. The Answer follows Aigis from the main game and a new party member that joins her on a quest that involves events that take place after the main story in Persona 3. Given that this is a sequel episode to the main game, it has some players wondering if what happens in it is considered canon or not. It only makes things even more confusing when you have a later version like Persona 3 Portable that does not include The Answer. That said, we do not technically have an official answer on whether or not this epilogue is considered canon to the Persona 3 story. Even still, we can speculate that it is essentially canon given that nothing that happens in it necessarily changes the main story from Persona 3 or causes issues for later games in the series. The Answer is even hinted at in Persona 4 Arena, lending some credence to the possibility that this story starring Aigis is potentially canon.