So Kato can only spend 4 to craft a marionette. The whistle should be able to up him to 5. So where is the 6th Ki? Maybe I'm just not remembering something but as far as I'm concerned unless it's a misprint I can't figure it.
Drain Spirit?
The Jumo Ring - a Bushido Blog
Drain Spirit?
The Jumo Ring - a Bushido Blog