#ONEPIECE1183 Theory :
Esperia wasn’t some random West Blue nation of instrument craftsmen and musicians. It was a deliberate post-Void Century sanctuary where survivors of the Ancient Kingdom preserved the auditory Poneglyphs—turning hidden history into songs, instruments, and music-as-weapon techniques so the truth could survive erasure. Imu personally erased Esperia because they held the final audible key to reuniting the seas. The multiple personalities of Princess Gunko reflect this fracture: one still carries suppressed Esperia knowledge, while the demonic one is Imu’s influence trying to silence or weaponize it.