There's something weirdly familiar about this scenario. Aside from them being on the moon, it reminds him a little of Takeda and Kung Jin. One who took everything seriously and one who couldn't be serious for more than two minutes. Coraline is very much the later in this scenario.

As far as memories he's found this one isn't a bad one, it makes him feel creepily voyeuristic, but at least he's not seeing something terrible. Torture or death or any number of things. She may be a teenager, but she's here, so she died somehow.

Carefully folding the opal into a piece of paper so he doesn't have to touch it, he goes to find her.