Sasuke and his group were lying in ambush on the first floor of the tower. The floor was spacious, with stone platforms built along both sides for samurai to stand guard or patrol.
The five of them were hiding on a stone platform pressed against the wall. The low wall in front of the platform concealed them perfectly, while the platform offered a broad field of view.
The five crouched behind the low stone wall, exposing only their heads. Dozens of meters below stood a large number of samurai. With Karin and White Zetsu both possessing sensory abilities, it was unlikely that the samurai would notice them.
Three of the Kage had already entered the tower. None of them had come alone; each had brought two trusted aides. This was an unspoken rule of the Five Kage Summit: each Kage could bring at most two subordinates.
The Raikage, Kazekage, and Mizukage had all entered the tower. The daimyo of the Iron Country had shown them considerable courtesy, sending his top general, Mifune, to preside over the meeting. Mifune was highly renowned among shinobi. The mere fact that he had survived an encounter with Hanzo was enough to make a name for him.
Who was Hanzo? He was the shinobi known as the "Demigod." As for the one called the God of Shinobi, there was only Hashirama Senju.
During the Second Great Ninja War, Konoha had defeated the Rain Shinobi Village. Unfortunately, Hanzo had been far too powerful. The Rain Shinobi army had been defeated, but its leader, Hanzo, had not. Thus, Konoha had not demanded excessively harsh war reparations.
Being able to fight Hanzo and survive meant that Mifune was no minor figure. Moreover, Mifune had not begged for mercy after his defeat, which had raised his reputation even further.