My Other Half (Reader x Creepypasta/Various)

Hi, my name is Scarlet Moon. When I was born I was given this necklace with a weird symbol on it, but it feels like it's missing something. Some of my friends have some too, I asked them about it but they say that they got it when they were born and their parents won't tell them anything. My parents won't tell me either, only to tell them when it warms up. ~Weird~ (I got this idea from a Facebook post, it's not my idea)