Hello there! HOW ABOUT THE NEW DEMON SLAYER EPISODES Y'ALL! Anyways, I really wanted to write something about Muichiro, because he's my favorite character rn. I really hope y'all enjoy this!

Aria Tokito's POV
My brain felt fuzzy. My eyes were heavy. My ears were ringing. I couldn't move my limbs. Everything hurt. I didn't know where I was, or what happened. I cast my mind back.
Mui, Yui, and I were sleeping. Then, something came...
My eyes suddenly snapped open as memories slammed into my brain.
"Yui!" I screamed.
The last thing I remembered, he had been badly hurt by the demon that came into our house. And Mui...
"Mui! Where are you!?"
I kept screaming, crying out for my brothers.
It took a moment for me to notice that hands were gently grasping my shoulders, and voices were speaking, trying to calm me down.
I couldn't care less about what they were saying. I had to know that my brothers were safe.
Finally, a voice broke through the haze in my head.
"I will tell you how your brothers are, young one, but you must calm down."
The voice was soothing, enough for the haze over my eyes to clear.
Looking up, I saw a man with black hair, and a strange, purple scar on his forehead. Next to him was a woman with white hair and purple eyes, and another young woman with black hair and a butterfly pin.
I recognized the white-haired woman as Amane Ubuyashiki, the woman who had been visiting my brothers and I for the past few months. That meant that the man next to her was probably the Master of the Demon Slayer Corps.
But all I wanted to know was where my brothers were.
"There we go, calm down, you'll be alright," the man soothed.
"My-my brothers..." I could barely get the words out due to my panic. "What happened?"
I sat up with help from the dark-haired woman.
It was Amane who answered.
"A demon attacked your home. Your own injuries were rather severe. You have been unconscious for a week now. Muichiro survived, but he is still in a coma. He will fully recover in time. As for Yuichiro..." Amane paused, taking a deep breath. I didn't take my eyes off her. "I'm sorry, but he didn't make it."
I couldn't believe it. Yui couldn't be gone! It was supposed to be the three of us, together! How could he do that?! How could he die?!
I put my hands over my face and began to cry.
I felt a hand on my shoulder, squeezing gently.
"You have my deepest condolences for your loss," I heard the Master say softly. "Whatever you may need, we will be happy to provide."
I sniffled.
"Can I- can I see Mui, please?"
Amane looked at the other woman, who nodded.
"Yes, of course," she said.
I was then carefully helped to my feet, and taken to the next room.
I gasped when I saw him. He was lying on his back, covered in bandages.
"We found him in the house, not far from you and your brother. It looked like he had managed to fend off the demon until the sun came up."
I blinked. My soft-hearted, gentle, optimistic brother was able to fend off a demon? How?
I carefully knelt at his side and reached for his hand.
"Please wake up soon, Mui," I whispered. "I need you."
I looked at all of the injuries that he had accumulated, and a deep anger was stirred inside me. I looked at Amane, determination shining in my turquoise eyes.
"Teach me how to kill the ones who did this."

*****time skip*****

Aria's POV
A month had passed since I had woken up.
Mui was still in a coma, but his wounds were almost healed.
I have been training for the final selection, which was to be held in six weeks. I was learning the Wind Breathing style. I had tried Mist Breathing, but Wind suited me better.
Once I was done with my daily exercises, I trampled inside, tired.
"Here are some rice cakes, dear," Amane's voice welcomed me inside.
"Thank you, Amane," I said, bowing respectfully.
I munched on the rice cakes as I traveled down the hallway, where Mui still laid, unconscious.
I quietly opened the door, shutting it softly behind me.
I looked at Mui. He was just as still as before.
I knelt next to him, taking his hand and talking to him, as I did every day. After awhile, I simply curled up next to him, holding his hand.
As I sat there, I felt my eyes struggling to stay open. I drifted off, still holding Mui's hand.
I was jolted awake when I felt his hand abruptly pull away, and a confused voice mumble to himself.
I looked over, and smiled.
"Mui! You're finally awake!"
Instead of smiling at me, he stared at me blankly. I felt my smile start to fade in concern.
"Are you hurting at all? Shinobu said that your wounds were almost-"
I was abruptly interrupted.
"Who are you?"
I started at him, my mouth gaping, not quite able to process what he said.
"W-what?" I stuttered.
His eyes narrowed at me. It was strange. It was like his whole personality had changed.
"I said, who are you?"
He didn't remember... he didn't remember... he didn't remember me... I didn't know what to think, or do. Do I tell him? What would he do? Would he think I'm lying? We had the same hair and eyes. Surely that would convince him? Could he just be messing with me? If so, it was a cruel joke.
My lack of a response didn't make him happy.
"Well? Are you gonna say something, brat?"
That pushed me over the edge. I fled from the room, trying to hold back tears. That wasn't my Mui. My Mui was sweet, gentle, and kind. The boy in that room was not. I finally caught sight of Amane.
"Amane!" I cried out, rushing to her.
She turned to me in confusion.
"What is it, dear?" she inquired, worried.
"Are you sure that it was Muichiro who survived?" I asked in a rush.
Amane blinked in confusion.
"Yes. Triplets you may all be, but there are small differences between you three. Why do you ask?"
I wiped my eyes.
"Because Mui's awake, and he doesn't know who I am. He also acted a lot more like Yui than himself. There's something wrong."
Amane quickly went with me back into the house.
"Go summon Shinobu. I will talk to your brother. Hopefully, this is only temporary."
I nodded and rushed to obey.

As it turned out, Muichiro was suffering from amnesia. He didn't remember anything except for his name. He didn't even remember his own family. I wanted to tell him who I was, but there were concerns about the potential psychological backlash that could cause.
So, here I was, stuck trying to get to know my own triplet brother a second time.
Not that he knew that.
I had apologized for my shock when he woke up, and we were... acquaintances. He was certainly different. His manner was more apathetic than anything. I had to tell him my name every now and then again, but I didn't mind. He was here, even if he was different, and that meant the world to me. Even if his amnesia made me feel as though I had lost both of my brothers.
Mui had taken to the sword even quicker than I had. He was learning Mist Breathing, which, I suppose, was appropriate. He even made his own form for it.
The two of us were intending to attend final selection together, which was tomorrow.
"Do you think we'll both survive?" I asked him.
We were sitting on the roof, watching the stars.
He shrugged.
"Probably. We're both decent swordsmen. If we don't survive, then we must be too weak to become slayers."
I fought the urge to sigh. He had started saying strange things like that ever since he woke up.
"Sometimes, people are strong in other ways. Take Shinobu, for example. She physically cannot cut off a demon's head, but, with her intelligent mind, she managed to make a poison that can kill them."
Mui scowled.
"She can still kill them. If she couldn't, she would be just as weak as the rest of them."
By "the rest of them" he meant those who weren't demon slayers.
I looked up to the stars.
"Still, I hope we both survive."

*****time skip*****

Muichiro's POV
As I was fighting Upper Moon Five, I had started to regain my memories. I remembered my father, my mother, Yuichio, and...Aria... my sister.
My heart beat wildly as the memories rushed into my head.
Aria... she was my sister... my triplet sister... how could I forget her...? How...?
As I raced back to the sword smith village, I made a decision. I was going to find her, and apologize for forgetting her.

Aria's POV
"Aria?" I heard a voice say behind me.
It had been a few days since Upper Moons Four and Five were killed, one of them by my own brother's hand.
As for Mui, he had been trying to talk to me ever since it happened, but there hadn't been time.
As it so happened, I had a few minutes to spare.
"I can talk, Mui, but you'll have to make it quick," I said apologetically.
The next thing I knew, I was being hugged. By my brother. Who had barely let me touch him since he woke up, over two years ago.
"I remember, 'Ria," he said softly. "I'm so sorry that I forgot."
I blinked back tears. It had been years since I had heard that nickname.
"I missed you, Mui," I sniffled, clutching him tightly.
He held me just as tightly.
"I missed you too, sister."

*****time skip*****

I coughed up blood as I laid on the ground. I was in bad shape. Both of my arms were gone, and I had been stabbed in the torso. I could barely see Upper Moon One's corpse disintegrating not far away. I knew that I was dying.
Mui was in worse shape. He had been cut in half. I managed to turn my head to look at him, barely able to hear Gyomei's gentle voice soothing us.
Mui's eyes were glued to mine. He was quickly fading.
See you in the next life, sister... his eyes said.
I felt my visor going black as I succumbed to my wounds.
See you in the next life, brother...

Hi y'all! I hope that y'all enjoyed this imagine! I've kinda had this idea in my head for awhile, and now I finally put in on paper!
❤️Soundwave's Wife❤️