Bleach: Watch Closely, This Is How You Use a Zanpakutō

"Whisper, Muramasa!"

As Kōga Kuchiki chanted the release command, Muramasa's blade emitted a pale purple wave of Reiatsu, spreading outward through the dissipating smoke.

"You really don't know when to quit, do you?"

Masatsuki Aozaki sighed, standing motionless as the thin, thread-like ripples of Reiatsu passed through his body.

In that instant, he felt his Zanpakutō stir.

It wasn't Muramasa's ability taking effect—rather, the mischievous little demon, Banshō, was protesting.

"You actually sealed off your heart on purpose! I was hoping that after he used Bankai, you'd bring me and my sister out to play with you!"

"Alright, alright, we'll have plenty of chances to play. Just hold on for now."

Masatsuki Aozaki reassured her. This little demon was truly spoiled.

Banshō snorted in displeasure. "Whatever, I'm going back to find my sister!"

...