Another option is that the camera is always pointing at the player character, but not from behind. The tracking Resident Evil cameras are occasionally like that, so zombies that the player character would see from a first person perspective are completely invisible to the player looking at the screen. However, looking at the avatar’s face could give clues where the enemy is. As an alt, the AI (and your view) could be of a shooter, and you have to escape, but can only see what they see