Step 15: Draw a curved line below the nose for Ariel's top lip. Like the eyebrows, the top lip consists of two lines on top of each other to make it thicker. The top lip should be thinner on the left side and should curve slightly on that side too.
Step 16: Draw a curved line below the top lip for the bottom part of the lower lip. First draw a mark to indicate how low Ariel's bottom lip will be, then close up the sides with curved lines. Add another curved line inside the mouth to indicate the top part of the bottom lip.
Step 17: Draw the side of The Little Mermaid's face using the initial circle and arc as guides. Follow the basic path of the guides as you darken the lines to create the shape of the face. The line for the face should come inward a bit near the eye to create the cheekbone. Make the bottom part of the arc rounder so that Ariel's chin doesn't end up being too pointy.
Step 18: Darken the lines under the head to create the neck. Extend the lines farther outward to create the top part of Ariel's shoulders. Add a couple of short lines under the neck for the collarbones. Draw a small curved line on the left side for the lower part of the ear.
Step 19: Draw a long, wavy line above the eyebrows for the first part of Ariel's hair. The left side of the line should graze the eyebrow. The right side should come out of the head and curve down slightly. Draw three curved spikes on the left side to represent the tips of the long bangs.