Ruusstha Vidyarvrikt was an elderly Ongree female nursemaid from Dalna who served the Jedi Order. The Ongree often sang a nursery rhyme to Jedi younglings who would not go to sleep in an attempt to make them be well behaved. Among the younglings who heard the song were Emerick Caphtor and Stellan Gios, who recalled it years later.
- Star Wars: The High Republic Character Encyclopedia