The Secret Reports introduce essential new information. Consult these in order to better interpret the storyline of the KH series.

Day 7
Written about the beginning of the Replica Plan. "No.i" is Xion's former name, and including an "X" as proof of her heresy, she is renamed "Xion".

Day 23
A note by Vexen, who created Xion. The "other" person is the Riku Replica that stands in the way of Sora and his friends in Chain of Memories.

Day 24
From the time that Sora arrived at Castle Oblivion in Chain of Memories. Marluxia, Axel and Zexion each reveal and hide their intentions in their own ways.

Day 27
More content connected to Chain of Memories. Part of the meaning behind Marluxia's intent to manipulate Sora using Naminé's power was also to oppose the Replica Plan.

Day 74
Description of the first day Axel saw Xion's face. From this day, due to Roxas' influence, Axel is also able to see Xion as a young girl with black hair.

Day 151
Xion's state of absorbing Sora's memories through her connection to Roxas changes. The dream of drowning in the ocean is the scene from the opening of Kingdom Hearts I.

Day 194
Written by Axel, who has learned Xion's true nature from the data left at Castle Oblivion. Axel hides the fact that Xion has gained a will of her own from the Organisation - these details are foreshadowing for Axel's appearance at the meeting on Day 354.

Day 256
The fact that Xion reflects varying appearances depending on who's looking at her is written here. We can see that she appears as someone else to Xemnas and Xigbar.

Day 321
Having seen the poor state Roxas is in with her own eyes, Xion once again thinks about her own existence. These details are based on how during the mission to Agrabah she saw Sora's form, locking the keyhole, and on her discussion with Axel after returning home.

Day 356
One of the reports showing that Axel and Saix once had a close relationship. The fact that they joined the organisation together is revealed.