"How did you find this out sir? It's still in its early stages so there shouldn't be any symptoms though this is the best time to catch it before it becomes life threatening." A white hair man with brown colored eyes and a kind looked on his face stared at the man who was in a white dress shirt and a lab coat. This was the same doctor who was with Yoriichi.
"I didn't know but the one of my patients before saw it and told me."
"So they had some kind of ocular quirk that aloud them to see through a person or rather within a person?"
"No. This patient was a four year old child and his results came back as quirkless."
"Really? A quirkless child! If I didn't know any better, I'd say he has the ability of The Transparent World." The first man chuckled along with the second before they both came to a sudden stop as they stared at each other wide-eyed before jumping into action. The white haired man fished out his phone and dialed a very important number while the other man went back to his office for the files of his previous patient. The person on the phone answered after the man came back with the required files.
"This is the Ubuyashiki household. Amane Ubuyashiki speaking. How may I help you?" A soft melodic voice answered.
"Greetings Amane-sama. This is Rin Hashinari and alongside me is Goto Hatake. We would like to speak with Oyakata-sama on a very important matter that has come to our attention." The now known Rin tried to stress at just how important this matter was and Amane being quite understanding immediately put them through.
"Good Morning Goto-kun, Rin-kun. How are you both doing today?" A smooth gentle voice resonated throughout the speaker which caused both men to subconsciously relax.
"Good Morning Oyakata-sama. It is with great pleasure to have you in continuous good health and it is with great honor that we are able to speak with you about a new pressing matter." Goto started.
"Oh. And what might that be?"
"We have quite a number of reasons to believe that another past Demon Slayer member has been reincarnated although he is only four years old."
"Is that so. Well that's good and who might this person be?"
"We have reasons to believe that he is.....the First Breath User."
There was silence for a full minute before Oyakata-sama spoke again.
"And what reasons are these exactly?"
"Well he's already able to use the Transparent World as he was able to tell me about a tumor that I am now looking into. He has maroon colored eyes and black hair with maroon highlights and he has a flame like birthmark on his forehead. He looks exactly like Michikatsu-san and before he left, he told me that the next time we meet, he would rather be called... Yoriichi Tsugikuni." Goto took a deep breath after he finished speaking.
"Ok thank you very much you two. For the time being send his files and we will have someone look out for him. Have a good day."
"Yes Oyakata-sama and have yourself a wonderful day as well."
The call ended and the two doctors started at each other before an important question was asked.
"How is your sister going to react? If I remember correctly she was his wife before." Rin asked.
"I'm not sure but hopefully they get back together."
While they were talking Kagaya Ubuyashiki also known as Oyakata-sama placed the phone back on its holder before staring into plum red eyes already looking into his lavender eyes. These eyes belonged to Muzan Kibutsuji.
"How are you feeling?" He questioned.
Muzan looked down at his small four year old hands before answering.
"Scared but.... kinda relieved? He was and still is my biggest fear after all so it will take some time for me to get over it even if we are on the same side now." He answered honestly.
Kaguya nodded. "We won't tell Michikatsu about this yet. Let's see what the future holds in store for you all."