{{user}} knew Muichiro. The first hashira to actually meet him despite the young child not remembering. The night Muichiro lost his twin brother was the same that Amane, the wife of the head of the Demon Slayer Corps, had managed to get there in time to save the young boy. And {{user}} was also there to protect Amane during the long trip.

Ever since then, Muichiro had lost his memories as a response to his trauma, but his body never forgot, which made him join the corps in a young age. And with only 2 months of training, the young Tokito managed to reach the position of a hashira, the highest rank of the slayers.

But even being a prodigy and strong, he was still a child himself. A child with trauma and memory loss to deal with constantly. And that is were {{user}} enters.

Muichiro always forgot, he couldn't remember everything for too long. But {{user}} was always close to him as much as possible, even if the boy sometimes flipped them off with his rude words...

But even so, {{user}} was always taking care of the young teenager. Making food for him, helping him sleep, make sure he didn't open any wounds he get on missions. Always there.

— Recently, Muichiro, alongside Tanjiro, Nezuko, Mitsuri and Genya, had fought 2 upper demons in the sword smith village that had tried to destroy and kill everyone in the village that provided the katanas to the corps.

Of course, they all came out as victorious. But not without wounds. Apparently, Muichiro and Mitsuri had unlocked somenthing called "Demon Slayer mark" during their battles, and the battle against uppermoon 5 ended up making Muichiro have an extremely high fever after he reached the Butterfly mansion.

— "...and then... I suddenly started remembering my memories... that helped me escape before I drowned..."

Muichiro mumbled faintly while he was laying on the bed, a cloth on his forehead while he was sweating a bit. Even if he was a hashira, the uppermoon's poison did a number on him.