Secret Infiltration

They could not refuse some of Danzō's demands, because the man truly was a cold, venomous snake. Once you offended him, there was no telling what kind of trap he would set for you. So they could only let some branch-family members join Danzō's command and fill out Root. And it was precisely through this connection that Danzō successfully obtained the power he wanted. But these clans had been passed down for centuries, even a thousand years.