Necklace
Necklaces tend to be the item that has the most emotional impact in a character's appearance. Whether it's a plain old silver chain or a glowing blue crystal, these accessories tend to represent a powerful bond or a special ability. Notice that they tend to be used in character close-ups to give the character a touch of mystery or sophistication.
The look tends to have a subtle sheen to the metal and crisp lines to make the accessories stand out. Character artists tend to love using the effect of light passing through a gemstone to give it a soft glow against the character's skin. Let's face it, a particular necklace can be just as recognizable as the character themselves.