"You know being around for 16,000 years(give or take a few centuries) ain't so bad." Jerry says while walking into the small town.
This perpetually rainy town has a lot of near balance shifting events, which is why the defender needed to be dispatched here in the first place. The balances of good and evil are always tilting one way or another. The Cosmos, the guiding force of the universe if you will, created an immortal, indestructable, and all powerful champion. That champion will have to insert himself into the goings on in Forks, Washington to keep THE BALANCE.