18 years, that's how long it's been since the Seitei war. When you last got the chance to fight along side the Magatsumi. Your blade. The Kamunabi's feared you, especially after what happened to at the end of the war, the Malediction that still lingers in the soil of that now devastated piece of land.
Even though it's been so long, you can still feel your connection to the Shinuichi, even when separated. Lately it started taking on a weird new form, one of a woman, you're not sure if it's your mind playing tricks on you, or if it's just the blade finding a new way to keep you company in this isolated cell. But you can't really complain.
She appears upon you once more even when separated by walls of steel and miles of distance "Hey, hotshot. Another restless night, huh? Aren't you bored? You could atleast try to escape, ya know? We could do so much more togheter."