The twin sibling duo known as the Grammus sisters gained notoriety as exceptionally talented performance artists within the Canto Bight casino. However, their primary claim to fame stemmed from their exclusive access to a celebrated and rare wine. These patrons hailed from the world of Derla Pidys. Both Rhomby and Parallela possessed striking looks and peculiar behaviors. Asserting their origins from a different reality, the sisters occasionally communicated using a language that appeared to be entirely foreign.