The dataR.cpk file found in Persona 5 Royal contains a GMD model folder, Model (P5R). Each folder is categorized by character ID number. See Model (P5R) for a full list of ID number with character names and descriptions. 4243 refers to Male Masked Pedestrian, and contains 3 GMD models related to him.
|3||c4243_003_00.GMD||Summer Casual||Casual summer outfit with mask|
|4||c4243_004_00.GMD||Winter Casual||Casual winter outfit with mask|
|6||c4243_006_00.GMD||Midwinter Casual||Casual midwinter outfit with mask|