S.’s sleep is best described as “hypnagogic terrors” which is something Jen suffers from. When Eric asks when she started suffering from them, Jen says “It’d be a good story is I said it happened for the first time the night after I disappeared. But I have no idea.” But she later corrects herself by saying “OK, I do know. It started that first night in the old factory.” Which must have been written after Jen admits she lied about her disappearance story. This could mean the night terrors S. suffers from are a result of killing people–doing something he fundamentally knows to be wrong. They started happening to Jen when she ran away, when she was knowingly hurting her parents.
S. describes the dreams he has and how sometimes Sola would come to rescue him. He associated her with the smell of “clary sage” to which FXC proclaims that this reference doesn’t necessarily say anything about who Sola is/was in the real world. This is likely because clary sage is not native to Brazil as FXC is and she believes Sola is a representation of her.