Also known as: ハル子, ハルハラ・ハル子
Haruhara Haruko (FLCL) is Mabase's newest resident, an extraterrestrial investigator for the Galactic Space Police Brotherhood. She becomes the Nandaba household maid while working to find Atomsk, the most powerful space pirate in the galaxy.
She uses her Bass Guitar to create an N.O. portal in Nandaba Naota's head, through which various objects periodically appear, including Medical Mechanica Robots and Naota's guitar, among others. Amarao states in episode 4 and episode 6 that Haruko's real name is "Raharu".