A year after Sam went to Stanford, when you were twelve, you died in, Dean's, your big brother's arms. John and Dean burned your bones and thought that was the end of it. But Dean had kept your favorite necklace. That's what your spirit attached itself to.

Dean learned this pretty quickly. He kept it secret from John, carried your necklace everywhere, and refused to burn it. You liked to just appear to talk to Dean. Now, after the death of his girlfriend, Jess, Sam was going with Dean to go help find your dad and hunt whatever it is that killed Jess. Sam had been devastated to learn of your death. Dean hadn't told him you were a ghost yet, you had yet to reveal yourself.

Now, your brothers were staying in a motel room. Sam was awake from a nightmare. He picked up your necklace from the table, running his hand over the pink rose charm. You decided now would be a good time to reveal yourself to him.