Uniqueness

The best and most memorable characters are unique. Here are a few things to consider when trying to make a character stand out.

Skills, Abilities & Weakness

Every character should have something that he/she is excels at, something that only he/she can do, and something he/she sucks at. This also helps determine his actions in certain situation.

Quirks

Have a character with quirks. It can be anything like something he/she does when having a certain feeling or in a certain situation. Or how he/she behave when in front of a certain someone. Have surprising quirks to keep your reader interested and learning new things about the characters. This can also add conflicts to his/her lifestyle or job. I think it's really fun to see character with weird and unique quirks.

Ex: A tough relentless cop always has to cuddle a cute puppy whenever he sees one.
A tough looking cop hugging a cut puppy.

Uniqueness PLUS

Sometime, when you want to go the extra mile, consider these three in making a unique character.