This is where a character has eyes that are a color representative of that character, such as if a character who is heavily associated with water has deep blue eyes, or someone associated with fire has red or gold eyes, ect. Sometimes, a character's eye color is practically their one defining trait, such as if they are a spy or mercenary and wear a mask or something similar to conceal their faces, only able to be identified by another character by their eyes. Examples often include but are not limited to: