Draw a simple curved line for the mouth
Make the curve small for a neutral expression
Tilt the curve upward for a smile
Tilt the curve downward for a frown
Add a slight opening below the line for an open mouth
Draw a wider shape for shouting or laughing
Keep the mouth small for a cute anime style
Use a short line or dot for a closed mouth
Add a second line inside the mouth for thickness if needed
Shape the corners to match the expression
Place the mouth below the nose and centered on the face
Adjust the size based on the character’s age and style
Refine the line to make it clean and smooth