Drawing a manga character, can be very difficult sometimes. There are many things that you have to consider to make sure that the final result is going to be good, and you also have to be careful to proportions in general. One of the thigs that you might have struggles with, could be the ears. 

Did you know that there is a trick to make sure that the ears that we draw are in the right place when we draw a manga front face? You can experiment with it right now. How? put your index on top of your ear and your thumb at the bottom. Then, keeping the position of your fingers, move your hand horizontally in front of your face, and you will see that your index, is exactly on your eyebrows, and your thumb, is exactly under your nose. There you go! Now you know where to position your ears: they will start from your eyebrows, and end just under your nose. Also, try to start drawing the left ear, so when you have to move to draw the one on the right side, your hand won’t cover the first one that you drew, and you can look at it easily to copy the shape for the ear on the right side