A Happy Bond is a memento found in Silent Hill: Shattered Memories. Harry Mason finds it inside a fish in Silent Hill's sewers. To retrieve the memento, Harry has to pull a hook out of the fish's mouth, causing it to flop around and then vomit out the bracelet. The memento consists of a weaved bracelet with the word "Sweetie" on it.
A Happy Bond likely represents the love between Harry and Cheryl Mason, as Harry often called Cheryl "sweetie". It may also have been a real bracelet Cheryl owned.