Everyone who knew Yorichi could say that he was a calm and composed person, someone who rarely show his true emotions.
His elder brother saw him as an obstacle in his path that he needed to surpass.
But no one knew how kind and selfless he could be.
Yorichi always put others need before his own, it was till the point of him blaming himself for others demise.
A perfect example of that could be when he wasn't able to save a family or someone from a demon attack because he got too late to the scene, like his wife and unborn kid.
Or when he discovered the price of succesfully awakening the demon slayer mark... He practically condemned the ones that awoken it to die at the age of 25.
Another one could be when he failed to kill Muzan once and for all when he had the oportunity. He let the demon traveling with Muzan to distract him, ending with Muzan exploding in 1800 pieces of flesh, which he was only able to cut 1500, leaving enough for a head to reform.
Then came the news of his brother turning to a demon.
Aparently, Muzan had meet with his brother and offered him to become a demon before he meet him, and almost slaughter him.
So when Yorichi discovered it, a deep sorrow formed in his heart. He may not know what passed through his twin mind for him to become a demon, if he became one willingly, but he knows that now the next time he will see him, that he will need to kill him, to prevent more deaths.
Something he does not wants to do.
The only living person that he holds close to his heart, has become a man eating demon.
After they gave him that new, discovered that he failed to kill the progenitor of demons, and that he spared a demon's life.
Almost all the remaining hashiras in the corps decided that he should kill himself by comitting sepuku, something that the current Oyakata quickly turned down.
Instead he got banished from the slayers corps.
He wandered the country for a while after that. One time he saved a family from being eaten by a demon, when he was going back to the house he used to live with his deceased wife Uta.
After showing the head of that family, who also happens to be his friend, his breathing style, and passing his earrings to them, knowing that they will take great care of them.
He once again left to wander the land, slaying any demon he encountered in his path without mercy, sleeping during the day, and traveling at night for a highter chance of encountering demons while traveling.
Right now, he was heading to a village in the northwest of Japan, he heared rumors that there was seen a weird winged humanoid creature flying at night, really few could spot it, because it could hide really well in the dark, but what gave it away was the bright neon purple wing folds that it had.
He knew it was probably a demon, since it was only saw in the dark, but it could be a bird or winged nocturnal animal too.
He had yet to see a winged demon, and he didn't knew how he would kill it since it could escape his sword by flying highter than his aim could reach.
He may be the strongest and faster demon slayer in history, but he still has some disadvantages against a flying opponent, after all, there is a limit to how high he can jump, and how far his sword can go while still holding it.
He didn't take too long to reach the village, but by the point he did, it was already day time, so he started walking around.
It was a nice one, all the villagers were peacefully doing whatever it was they were doing, there were some people selling food or other things, some were carrying a basket full of dirty laundry, ready to walk to the nearest river to wash the clothes.
It was as if the demons has not reached this village yet, something that almost brougth a smile to his face, it was nice seeing for once a place that wasn't haunted with the fear of their loved ones dissapearing at night.
While he was wandering the village, he noticed something weird, at least for him, because around all the people, there was a particular lady that caught his attention.
She had an aura similar to the one from Muzan Kibutsuji, if not stronger than his. that was something to be feared, considering that Muzan was the demon king, meeting someone stronger than him, didn't fit right with him, since he knew that his purpose on this world since he was born was to defeat Muzan once and for all, someone that was stronger was a weird variable that shouldn't exist.
But that wasn't the weirder part, if she was a demon, like the ones from Muzan, it should not be possible for her to stand under the sunlight, and she was standing right under it, some sort of illusion resembling an angelical halo was surrounding her.
And for once in his life, Yorichi thougth his senses were deceiving him, he was doubting why he tought earlier that such a beautiful women could be a demon, her skin was almost sickly pale, her hair was black with the tips fading to purple, she had heterocromatic eyes, the left one was purple and the right one turquoise, she had a weird birthmark like his going from a little above her right eye to slightly above the lip, and she had a melancholic almost sad look while looking at the sky.
She seemed to notice that he was staring at her, because she turned in his direction, and that was when her whole demeanor changed, she gained a mischievous look, the pupils on her eyes almost became cat like, something that put Yorichi on edge, and all his doubts about her not being a demon dissapeared that instant.
She was aproaching him, and he could notice the resignation on the face of all the villagers, it was as if this wasn't the first time something like this happened, and as if they knew what was going to happen with him by just looking at her expresions.
Something that he could not understand, because when she was aproaching him, her expression turned from mischievous to something similar to childlike joy, she seemed to deep in her thougths to notice the growing confusion on his face.
When they were finally face to face, Yorichi would have never expected to hear the next words that came out of the woman's mouth...
"Be my child"