When he was still alive, Nobutsuna had always been thrust into dangerous and life-threatening situations. However, he had always come out of it relatively safe largely because of his intuition and desire to survive. He enjoyed spilling the blood of his enemies, but ironically, he feared his own blood spilling so among the original Gotei 13, he secretly got the reputation as a 'coward'.
He ignored this since it was much more important for him that he survived and Yamamoto himself also actually appreciated this attribute of his because it had saved the group multiple times. Ever since joining the Gotei 13, Nobutsuna majorly relied on his monstrous guts to take advantage of multiple occasions.
Unfortunately for him, however, he underestimated the damage his own Zanpakuto had done to him, especially after the Quincies' invasion more than a thousand years ago. He died due to his weakened body suddenly failing him when he reached a relatively old age.
In Hell, he found new life and as he discovered that he was unkillable and could even become stronger, he slowly stopped relying on his gut feelings due to their inaccuracies that didn't account for his immortality.
This was the first time in a long while that he felt his instincts stirring when Chika and the others attacked but it wasn't a very strong feeling so he just ignored it. But throughout his exchange with him, he felt that something was wrong but couldn't point it out. It was when he heard Chigiri's message that his heart almost leaped out of his chest as a dark premonition dawned on his mind, 'I have to escape!' were his first thoughts.
However, as he expected, Chika wouldn't let him go easily.
As soon as he felt Chika's Reiatsu rising exponentially, Nobutsuna also felt multiple presences suddenly appearing all around him.
He stopped his escape attempt and looked around to see a hundred Chika's surrounding him. It was another Bankai that doesn't allow the use of any Kidou while active so instead the user focused on Martial Arts. In Chika's case, he focused on foot techniques and blade techniques contrary to him who focused on fist techniques.
"Damn you..." Nobutsuna muttered to himself as the hundred Chika's descended upon him.
.
.
.
Chigiri kept looking at the Hell Butterfly in his hand but found no reply from Nobutsuna. This made him crease his brows since he was sure that he would at least reply back with something mundane.
Chigiri contacted him because he felt that he activated his Bankai and wanted to know the real situation on his side to get a bigger picture of what was happening right now. The next moment, he felt Chika activating his Bankai and asked himself, 'What's happening? Could it be...?'
He then turned to his opponent and saw her casually turning towards the direction where Chika and Nobutsuna were fighting, "Hoo... Chika used it, so that coward probably tried escaping." Furoufushi then smirked, "Hilarious. So much so for being immortal."
Chigiri remained silent and observed the situation more.
The Furoufushi he was facing right now is still the same Furoufushi that he knew. A brash woman who's only average in Zanjutsu, Hakuda, and Hohou. On top of this, Furoufushi was incapable of properly using any high-level Kidou spells due to her innate Reiatsu being lower than even your average Lieutenant these days.
Regardless, she still became a Captain and one of the founders of the Gotei 13 and that's thanks to her special physique that allows her to regenerate used Reiryoku within a split second, essentially making her always at the top of her form. Because of this, Furoufushi mastered terrifying techniques that suit her very well which are called [Delayed Spell] and [Flash Cast].
Putting his hand forward, Chigiri chanted, "Tenran (Orchid Sky)."
In the next instant, a widening tornado blast appeared in front of his palm and started gouging the ground as it made its way toward Furoufushi. As expected of the Captain who has the highest mastery over Kidou, this casual tornado of his is enough to severely injure a normal Lieutenant.
Furoufushi, on the other hand, just calmly turned her head back to Chigiri and raised her hand too, "Shou (Thrust)." One of the first Kidou Spells that a student in the Shinigami Academy would master, Hadou number 1, Shou.
Different from the students and normal Shinigami, however, Furoufushi's Shou gathered an invisible wall in front of her before sending out a blast of shockwave, entirely dismantling the incoming tornado with ease and even sending some force back to Chigiri, forcing him to slide back and crouch down.
"As ridiculous as ever. How many Shou did you superimpose?"
"Hmmm... I think around 300?" Furoufushi honestly answered his question which resulted in his mouth twitching.
'She produced 300 Hadou spells in that small amount of time? Really ridiculous.' Chigiri thought to himself.
In the past, he also tried learning the technique of superimposing the same spells into one. He thought he could do it too as long as he had enough Reiryoku but immediately found out that while he could replicate it, he could only overlap 10 of the first Hadou no matter how much he tried and experimented. And if he increases the level of his spell by one, the amount he could do will be cut in half.
A long while after that, he figured out the reason that she could do something like that was because it had something to do with her pesky physique that granted her nigh unlimited source of Reiryoku.
Chigiri hated her. He hated Furoufushi as someone who did everything to master the art of Kidou and even created a few original spells of his own, only to be trampled by someone who was born with great talent.
After briefly reminiscing about the past, the flames of hatred he kept deep within him came out and burned even stronger thanks to the chains binding him.
Chigiri smirked and said in his dark voice, "I probably won't be able to defeat you with just Kidou spells, however, I found and learned something even better."
Descending into insanity, Chigiri threw his head back while laughing maniacally, and more than a hundred Magic Circles appeared behind him, "Behold! The Spells of Hell that can defeat your [Delayed Spell] and [Flash Cast]! And I'm not just limited to weaker spells!"
Raising his Zanpakuto in the air, he called out its true name, "Bankai! Flower of the Glazed Moon: Rejuvenating Root of Knowledge and Truth."