When he just spends time hiding away in the entire raid.
He should just be with shinobu in wano mainland. Orochi goons might be on his tail because kanjuro leaks the information, but then again it's still a safer move rather than just bringing him on the enemy lair. Shinobu is a ninja, she should be able to shake off the goons, especially since the big fighters are all on onigashima. Storywise, it doesn't make sense to bring him momo to onigashima.
He should just be with shinobu in wano mainland. Orochi goons might be on his tail because kanjuro leaks the information, but then again it's still a safer move rather than just bringing him on the enemy lair. Shinobu is a ninja, she should be able to shake off the goons, especially since the big fighters are all on onigashima. Storywise, it doesn't make sense to bring him momo to onigashima.