Luck, LCK in your 'score', represents your character's tendency to succeed or prosper through chance or good fortune. As in life, the exact extent of this factor remains and will always remain shrouded in uncertainty.
Also as in life, however, it can be said that luck's influence on a character is pervasive. Though it affects some aspects of life here in a very direct manner, it can affect nearly every aspect to at least a degree.
No class receives luck as a prime attribute.
*Information as of July 27, 2005