Okay. Another ROTG thought that just attacked me.
Pitch and Sandy are opposites.
Sandy brings dreams, Pitch brings nightmares. Sandy is gold (bright), Pitch is grey/black (dark). Sandy has dark eyes, Pitch has light eyes. Sandy is good, Pitch is bad.
Sandy is narcoleptic, Pitch is a raging insomniac.
At least, that’s what I think.
Besides, in order to spread bad dreams, AND fear, it would be resonable to assume the job takes up all the time you have for sleep.