Draw a slanted pentagon shape for Ichigo's head. The sides don't need to be equilateral. The left side of the face should extend longer vertically than the right, and the chin should always end on the point of the pentagon.
Draw one horizontal line and vertical line in the middle of the face, intersecting in the middle to form a cross.
Place two oblong circles on either side of the vertical line. These will be the eyes. Inside these circles, place one more set of circles (one per eye).
Create a light glare with the negative space in the upper corner of each eye by simply leaving it blank.
Draw an incomplete iris in the center of each eye, leaving room on the inside for the light glare.
Fill in the iris with dark color (black). Just below this, shade the rest of the eye a light gray.
Frame the eyes with sideways "[" shapes on top and bottom, intersecting the eyeballs at the top. This will provide natural shading to your Ichigo character's entire eye line.
Draw a checkmark shape over each eye. Each checkmark should be the width of the entire eye (if not a little wider) and should be thin on the inside and grow thicker toward the outside of the eye.
Add a simple straight line along the vertical face guideline for the nose. The end of the nose should end in a slight right hook to give the illusion of a nose without much detail.
Create a mouth one-quarter of the way up from the chin by simply making a horizontal slash in the midpoint of the face. To express a smile, add gentle hooks to the corners of this line.
Give Ichigo hair by drawing spiky triangles all over his head. These should extend from his eyes to the back of his head with no interruption or part. If you are going to use color, you should shade bright orange in this section.