Evil seeing that Good was broken, went over to steal his weapon and kill him for his power, but looking at how ruined Good was, Evil felt sorrow for Good. For the first time ever, Evil decided to comfort another person, and at that moment a piece of evil went to Good, and a part of good went to Evil. This exchange created what is known as the mark of evil and the mark of good. Three black dots around the eye is the mark of evil, signifying that the person has a bit of villainy in them.
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And three white triangles around the eye was the mark of good, signifying that the person has a soft spot within.