We, Ouroboros

We, Ouroboros is a memento found in Silent Hill: Shattered Memories. Harry Mason can find it behind the counter in the Green Lion Pawn Shop. The memento consists of a ring with two snake heads and the words "Love is a hungry drug".

Symbolism
"We, Ouroboros" possibly represents the way Cheryl Mason's love for Harry was like a drug, causing her to create a fictional version of Harry in her head. The mythology of Ouroboros is commonly depicted as a serpent eating its own tail, a symbol commonly know in ancient alchemy; in this ring there are two heads, with no tail to eat, which could symbolize that the ideology of immortality and life renewal is made from the other head, and that without Harry it is not complete.

Trivia

 * Ouroboros was featured in Silent Hill, but in the form of the Disk of Ouroboros. The naming of the ring may be coincidental, but it is more likely an intentional throw-back to the original game.
 * The Ouroboros represents the perpetual cyclic renewal of life.