Sentai Mecha Face Types

After Seeing some Sentai Robos, I decided to create a list of Types of robo faces (Each divided into 5 classes of face type)

Class 1: Standard Sliver face with no notable accesories (EG: GaoKing, OhRanger Robo, Jet Icarus)

Class 2: Face with special parts Like Eye Visors (Subclass A; EG: Victory Robo, Turbo Robo) & Mouth Shields (Subclass B; EG: Galaxy Mega)

Class 3: Eye Visor & Mouth Shields both present (EG: DynaRobo, OhBlocker, Kiba DaiOh)

Class 4a: Similar to Class 1, But the face is colored (EG: Siren Builder, Gosei Ground, Muteki Shogun)

Class 4b: Similar to Class 2, but the face is colored (EG: ZyuOh Wild)

Class 5: Known as "The Unusual" as I have no Idea how to classify them (EG: GaoIcarus, Shurikenjin UFO, RV & VRV Robo)