The data.cpk file found in Persona 5 contains a GMD model folder, Persona 5/data.cpk/model/character. Each folder is categorized by character ID number. See Persona 5/data.cpk/model/character for a full list of ID number with character names and descriptions. 1005 refers to Sae Niijima, and several GMD models related to her. The directory also contains folders organizing GAP animations by purpose (field, battle, event).
The below table was automatically generated based on similarities to other directories. Please remove this notice once inaccuracies have been corrected.