Quick thought about the Makizumi ninja squad following Chapter 57.

https://preview.redd.it/5ues4i3eo30e1.png?width=634&format=png&auto=webp&s=f32ef8ecae2eb2788e0fe0312c3ba6d36ec81828

Since they completely nullify sound and hostile energy, they're the only ones who can fight alongside Samura without interfering with his detection.

Conversely, they are also the only ones who can hurt or kill him with ease.

Just some food for thought. Whatever happened at Senkutsu might be less simple than the latest chapter led us to believe.