Did Gunko fet pain here because she come in contact with him or was she simply hurt by rejection?
Brook, Robin, Sanji and Zoro are connected to underworld in some way
Zoro is obvious one with enma and king of hell title. Rayleigh epithet is hades too
Sanji has attacked called Ifrit Jambe (hell memories).
" Ifrit is a powerful type of demon (or jinn) in Arabian mythology that are often associated with the underworld and identified with the spirits of the dead "
Robin's new form look similar to Zoro's attack Enbima Yonezu Oni Giri (Charm Demon Sleepless Night Ogre Cutter). This can be coincidence or maybe Robin is connected to underworld too
Brook said he can do freezing attacks because his soul energy excludes coldness (literally called Chills of Underworld)
If weakness is underworld powers then these characters will be the one to fight HKs now unless other strawhats learn to use underworld powers too.
BB's Yami Yami could be underworld power too and could play important role in defeating Imu.
There is a chance that Imu may be targeting Vivi because of this too. So many hints of Vivi being connected to Pluton and Pluton being ruler of Underworld in greak mythology

Brook, Robin, Sanji and Zoro are connected to underworld in some way
Zoro is obvious one with enma and king of hell title. Rayleigh epithet is hades too
Sanji has attacked called Ifrit Jambe (hell memories).
" Ifrit is a powerful type of demon (or jinn) in Arabian mythology that are often associated with the underworld and identified with the spirits of the dead "
Robin's new form look similar to Zoro's attack Enbima Yonezu Oni Giri (Charm Demon Sleepless Night Ogre Cutter). This can be coincidence or maybe Robin is connected to underworld too
Brook said he can do freezing attacks because his soul energy excludes coldness (literally called Chills of Underworld)
If weakness is underworld powers then these characters will be the one to fight HKs now unless other strawhats learn to use underworld powers too.
BB's Yami Yami could be underworld power too and could play important role in defeating Imu.
There is a chance that Imu may be targeting Vivi because of this too. So many hints of Vivi being connected to Pluton and Pluton being ruler of Underworld in greak mythology