Light Warriors

The Light Warriors in Final Fantasy 1 was the name given to the four-man party in which you controlled. Their goal in the game was to track down the demon, Chaos, and bring peace back to the land. Another way to say Light Warriors, would be Warriors of Light

Light is often symbol used to denote holiness or the prescience of God. If we allow Light to represent God, then we can allow Warriors of Light to become Warriors of God. The idea that they are tracking down a demon to destroy would reflect what many followers of many religions would consider a good deed in favor of a "good" god.

Chaos

As mentioned above, Chaos is a demon. Both in this game and in general, Demons are brought into the world to cause mischief and grief. Chaoses own name suggests this type of action, and so he does perform this action, causing Chaos in the storyline of this virtual world.