Ruusstha Vidyarvrikt, a female Jedi nursemaid of the Ongree species, was an aged individual from Dalna who dedicated her life to the service of the Jedi Order. To encourage good behavior in Jedi younglings struggling to sleep, this Ongree would frequently sang a soothing nursery rhyme. Emerick Caphtor and Stellan Gios were among the younglings who were exposed to the song, and they remembered it many years afterward.