Brook + gear 5 should be able to do something here.
"Warrior of Liberation" verses "God of Domination" (Domi Reversi, with Domi being short for Domination).
Since Gunko was seen responding to Brook's music favorably, Soul King is gonna have to put on a concert, to knock Gunko's pants(u) off, and Imu out of Gunko
Cool, we haven't see Soul King pop off, in a while. Wish he had done a concert in Wano, but, they're all scared of Ghosts, soooooooooo
Also, Brook spent a lot of time around Satanists, farming pantsu off of them (what a fucking sentence)
It's enitrely possible the country Nami is describing here is Namakura Island
If only I was an undead skeleton, I could get hot cult ladies to show me their pantsu...
Hehhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...
Ahem
Between the Pantsu and Satanist connection, Brook should be involved in using his music to liberate Gunko.
Go, oh Boney Bard... GOOOO FORTH, BROOK-SAMA!!!!!!!!!!!!!!!!!!!