Step 15: On the right side of the head, draw a curved line for Goku's ear. Inside the shape, draw a series of small, curved lines for the ear's structure.
Step 16: Darken the lines under the head on the sides for the neck. Below the chin, draw a couple of short, sloping lines for the detail on Goku's neck.
Step 17: Above the eyes, draw two angled lines that are similar to the letter V for the front part of Goku's hair. To the left of the head, draw an angled line to complete the front of the hair. To the right of the head, draw a big, angled line for the second part of this Dragon Ball Z character's hair. The line should basically be a big zigzag with three spikes.
Step 18: Now draw the rest of Goku's hair. Start with a small spike to the left of the eyes. Above that, draw a bigger spike. On the top, left side of the head draw the biggest, widest, angled spike. At the top of this Dragon Ball Z character's head, draw a final big spike. To the right, close off the shape with a short, curved lines. Add a couple of lines on either side for lose hair strands.
Step 19: Below the neck, draw the detail on Goku's chest. Start with the big, V-shaped opening on the gi. On the outer sides, draw a few lines for wrinkles. Inside the V, draw a couple of curved lines for the inner shirt and wrinkles. At the top, right below Goku's throat, draw two short, curved, horizontal lines for the top of his pectoral muscles.