Archetypes

The characters in any allegorical story are often used to symbolise certain concepts. These may be types of people (stereotypes); a group or organisation; a part of the mind; a power or force; etc.
 
Below are a list of the main characters in the film and what they symbolise.

Choi & Dujour

The drop-outs. These two (together with their friends) represent a part of society that has opted out of the “standard life model” and as a result, frequently find themselves of the wrong side of the law. (In the original transcript, Choi (or Anthony) refers to having his car clamped. Neo hacks the police computer and has it removed.)

They party, they take drugs and have come to offer Neo the Choix du jour (choice of the day), a choice to enter their world. (an interesting hint to the possibilities of mind altering drugs maybe?)