I'm tired today, so just a little fun fact: Lucifer doesn't just know Razzle and Dazzle, he's the one who made them (sort of). Assuming the old lore still holds true, they're actually Charlie's old stuffed animals, brought to live by Lucy to be Charlie's general assistants and servants. They were the one providing music for her during her song in the pilot, they were the ones driving the car, ect.