Who is the flash in Harry Potter?

Sparkling is a house elf. She used to work in the home of barty crouch, the director of the Magic Law Enforcement Department, and was very loyal to him. But Crouch kicked her out of the house. She found Dobby (who used to be Malfoy's house elf, but was later released by Harry), and Dobby took her to Hogwarts. Dumbledore agreed to work in the kitchen at Hogwarts, but Jingjing still missed Crouch, so she drank every day and didn't get to the point. It is said that she later became Dobby's girlfriend.