Does anyone know where the npcs are located?(i mean which file it's located in) Sorry I'm a beginner at this

Wait how did you manage to open gfx file in noesis? Everytime try to open the file in noesis it keeps saying "this file cannot be previewed"(this is the same for evd files) and I'm confused how do I open it in noesis? Can anyone help me with this problem? (Sorry I know I'm kinda late.)