How to Draw Trunks
Trunks
Well how to draw your favourite characters is easy. This stuff will be similar to how to do the Sailor Moon characters.
How to draw the face
Ok start off with a blank page make sure you do have the following things near by: A pencil HB I used, A white eraser not too dirty, a ruler and a blank sheet of paper.
1. Draw the base of the neck and make it in the middle of your page or in the middle of your ruled square. 
2. Next draw  his head make sure that the cheek bones (the points) are even with each other you can use a ruler to check.
3. Now you have the head draw using your ruler and mark out where the eyes, nose and mouth are going to be placed
4. Next draw the face features in starting with the eyes.
Drawing the eye's
1. Draw two triangle shape eye brows 
2. Draw two triangle shape eyes
3. Then draw two dots inside their you have it but he has a thick eye than Vegeta
back
Ok the rest is easy to do their noise, mouth, ears and so on.Well here's my drawing of Trunk's face . It's not traced or anything that is my drawing so is all the other ones too.