Kuchiki Hibiki was already at death's door. Once a Soul Reaper died, Muramasa, his materialized Zanpakuto, theoretically would not be able to linger for long either.
However, Muramasa's situation was quite different from that of other Zanpakuto.
For hundreds of years, in order to maintain his materialized form, he had devoured hundreds of Menos Grande. His body was no longer composed solely of a Zanpakuto.
Simply put, as long as he absorbed the Gillian Menos Grande present into his body once more, Muramasa possessed the ability to undergo Hollowfication directly.
And in his Hollowfied state, he would not be much weaker than Kuchiki Hibiki!
As a Zanpakuto, he was undoubtedly loyal. He did not care whether Kuchiki Hibiki's choices had been right or wrong. All he cared about was carrying out Kuchiki Hibiki's will!
Just as Muramasa gripped Kuchiki Hibiki's hand and prepared to undergo Hollowfication on the spot, the dying Kuchiki Hibiki shook his head upon hearing Muramasa's voice.
As beings who shared one soul, after several hundred years, Muramasa once again heard the voice in the heart of his master, Kuchiki Hibiki.
After a brief moment of surprise, Muramasa suppressed the spiritual pressure that was on the verge of running wild. He then looked at Yoru Machi and said, "I have one final request, Mr. Yoru Machi. After Hibiki dies, please plant my blade beside his grave."
Kuchiki Hibiki died. His Zanpakuto, Muramasa, could originally have survived a while longer, but in the end, he chose to end his own life as well.
As Muramasa's blade snapped into two pieces, his materialized body turned into green particles of light and continuously scattered away.
Before his body had completely vanished, he looked at Yoru Machi and voiced his final request.
Only after Yoru Machi nodded in agreement did he