Persona 5/ps3.cpk/bustup

The ps3.cpk in Persona 5 contains a Bustup directory, where DDS portraits of major characters are stored in special BIN files (DDS2 archives). The filename of each BIN indicates the character, expression and their attire. The DDS files for the game's final graphics are split into two layers, usually with different levels of compression (DXT1 or DXT5). In-game, these layers are overlayed to render the full image, preserving quality as much as possible (as DDS is a lossy format with some compression artifacts). Unused bustups are compressed with DXT3.