[Demon Slayer] The Nichirin Blade Has Come to Life!

I, Kyojuro Rengoku, Flame Hashira of the Demon Slayer Corps, have encountered something utterly unbelievable: my Nichirin Blade has come to life. Flame Hashira: Mmm! Thanks for asking. I'm on the battlefield when my Nichirin Blade suddenly vanishes into thin air. I'm facing Upper Rank Three alone, and I'm freaking out! A certain Nichirin Blade lady who prefers to remain anonymous: ...Thanks for asking. There are always vile people trying to harm me. One minute I'm walking along, the next I'm a useless sword that can't move, and on top of that I'm forced to cut demons for someone else. Ugh! (Leaning against a wall) At long last, she takes human form, only to get punched straight through the very next second. Nichirin Blade lady: ...@*#+@#, I have a few choice words, but should I say them? A certain Upper Rank who got beaten up: ??? I'm the one who should be cursing. :) A few things to know before reading: 1. The heroine is one of the demon clans from Hakuoki. You don't need to have read it to understand the story, and this section also contains original elements. 2. This is a real short story. It was born from my feelings after watching Mugen Train, and I won't make it long. I'll only publish it once the whole thing is written, and update daily until the ending, so feel free to jump in. 3. Big Bro survives! It has a real happy ending! 4. After the Mugen Train story arc, Big Bro leaves the Demon Slayer Corps and retires to the rear. Read with caution if that bothers you. 5. Your author loves writing fanfiction. Won't you come take a look? (Sits obediently) 6. This blurb was posted on January 27, 2021. The inspiration came earlier, and I have screenshots of both. If all of that sounds fine, then let's go! Theme: I want to save people! (Loudly)