The Great Laura Debate! Who really is Laura from Silent Hill 2?

[shootzombies]

Of all the characters, she is the only one who does not hold any darkness in her heart. It may be that she came to Silent Hill looking for Mary. To her the town appears normal; she does not see any monsters, nor does she see Maria.

Ok I have a question: If Laura can't see Maria than why does Maria have such an interest in finding Laura? What relationship does Laura have to Maria? I mean does Maria know that Laura has some kind of purpose in her mission to get James to remember what he did, yet Laura has no clue?