I know only 9 hashiras are aloud, but I don't care💀
And yes we making him WAY TOO OP😈

No one:

No one knew about upper moon incident, and Muichiro was probably gonna forget anyway, so Giyuu didn't tell him either. Which was probably selfish since non of the hashira knew what Muzan looks like, but he needed to also get more information about Muichiro's past and bloodline. UGH!! So much work!
Anyway!! It had been about a week since they've told everyone Giyuu was demon, and it hasn't been the best....But today they got some news. Everyone was told a surprise was too come at the Hashira meeting today, and that's where giyuu was heading. 
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As soon as giyuu arrived. As if on que he could feel stares of disapproval. 
"Have you eaten anyone yet?" Shinobu teased only to be ignored by Giyuu as usual. "You know ignoring someone is considered rude when they're talking to you" She teased once more. A tick mark growing on her face as she kept smiling. "You know his arrogant ass won't reply. Still thinking highly of yourself even after becoming a demon!?" Sanemi yelled. 
"Giyuu only looked around for Muichiro who almost immediately spotted him. Giyuu sighed. Knowing what was about to happen. Still he didn't mind. 
Muichiro walked over towards giyuu, and stared at him for a bit before talking about random things, and about his day so far. 
The raven let out a barely visible smile that only Muichiro could see, since he was so close. "You're smiling." The young pillar pointed out. Before continuing to chat away. This went on until the two of Kagaya's children came out to inform them he has arrived.
Everyone of course started to kneel, and finally. Mitsuri FINALLY got to greet the master.
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"Thank you Kanroji" He smiled gently. His voice soothing as always. "Welcome my children, now as you've already heard. I've prepared a surprise." 
'What was it?' They thought. 
"Now I know this is sudden. Since the Tomioka problem, and how we're in need of a new water hashira" Kagaya spoke once more. Giving off hints to the surprise. 
"I'm sure you have all noticed the shortage of demons, and how most of the time. Demons are randomly dying while you're traveling to deal with them...,but we now have the answer." 
This got everyone's attention. It was true. It was like someone was killing every demon before they could even get to the problem. But there master of course had the answer Like always!

"An unofficial demon slayer managed to deal with 3 lowermoons all at once." He chuckled.
Everyones eyes widened. 
Shinobu was first to speak.
"But, master how would that be possible!?"
Then the sound hashira Uzui.
"Flamboyant! He must be on hashira level!?"
And finally Sanemi.
"HOW COULD SOMEONE WHO'S NOT A SLAYER DO THAT?!"....
To answer that...Kagaya himself wouldn't know that at all. He just knew this person would be a step closer to helping defeat Muzan. "I understand all of your confusion, though he's technically not an unofficial member since we made him do the final selection. " He chuckled again. "Now if you would step out please....."
The next word nearly made Giyuu's heart stop.
"Sabito..."

There are mistakes here that I refuse to fix😘