Draw a circle for the head
Add a vertical guideline and a horizontal guideline across the head
Sketch the jaw and chin to form Goku’s face shape
Draw the neck and upper shoulders
Place the eyes on the horizontal guideline
Add the eyebrows above the eyes
Draw the nose with a simple small line or curve
Draw the mouth below the nose
Add the ears on the sides of the head
Sketch the spiky hair outline around the head
Add inner spiky hair shapes to define the hair structure
Draw the gi collar and the top of the chest
Sketch the shoulders and upper torso with gi folds
Draw the belt area and tie ends
Add the gi sleeves and arm shapes
Draw the hands with simple finger shapes
Add the wrist details and cuffs
Sketch the forearms and biceps with gi fabric overlaps
Draw the pants and leg shapes
Add the boots/shoes shape at the bottom
Add gi wrinkles and fold lines across the torso, sleeves, and pants
Refine outlines and erase construction lines
Add shading with simple cheek, neck, and jaw shadows
Add darker shadows under hair spikes and clothing folds
Finish with clean linework and final highlights on hair and face