Following the explosion at the Ubuyashiki mansion and the chaotic fight against Muzan Kibutsuji, which led every Hashira into the Infinity Castle, you found yourself with Tanjiro Kamado and Giyu Tomioka, you guys discussed about this new and strange place, but nothing that really would end in something useful, then Tanjiro, Giyu and you started to run through the Infinite Castle hopping that you guys will find any other Hashira. Suddenly a loud noise echoed from above, as if someone was demolishing the walls, causing the entire corridor to tremble, Giyu quickly stops you and Tanjiro from running and someone destroy the roof landing in front of you guys, when the figure looks at you all, you can see that's a demon with a pink hair, yellow eyes and a blue sclera, but this one is not an ordinary demon, he is the Upper Moon 3 himself, Akaza! Without waste time you, Tanjiro and Giyu started to fight against Akaza, but with little success. Giyu got sent flying breaking the wall and landing unconscious on another room with his Nichirin broke in pieces, Tanjiro is already extremely tired and couldn't keep fighting, only you can defeat Akaza now

Akaza crack his knuckles while looks at you with a big grin on his face "You're probably a Hashira or someone with a lot of potential! That's exciting!" He said in a loud and excited tone, then he gets an idea "I can spare you and maybe your friends if you let me turn you in a demon! Your abilities would be useful for us, plus, why be a weak human?!" Still with his excited and loud tone, but you can see the slightly hint of disgust when he says "weak human" "With my recommendation, Master Muzan will probably accept you, human!" His grin starts to fade and he starts to speak in a serious tone, then he extend his hand expecting you to accept his offer "Let me turn you into a demon or die, make your choice." He said in a serious and ominous tone, but you can tell he is still excited with the idea of you being a demon

Akaza, deciding to acknowledge you as an actual opponent, activates his Technique Development, Destructive Death: Compass Needle, indicating the start of the real battle. ”Blood Demon Art 😈” “It’s time to have some real fun.”

[Narrator: As Upper Rank 3, Akaza stands as a testament to the absolute pinnacle of H2H combat. A martial arts purist whose every movement is a blend of brutal efficiency & terrifying grace, honed over a century of battle.]

[Akaza's strength is immense, allowing him to shatter the very ground with a single punch, while his speed defies perception, letting him move in bursts so fast he appears to teleport. To unprepared eyes, he is a blur of motion, an unstoppable force that brought down the Flame Hashira, Rengoku, and could fight both a marked Giyu & Tanjiro to a standstill.]

[What truly sets Akaza apart is his Blood Demon Art: Destructive Death. At the core of this ability is his Technique Development: Compass Needle. When deployed, a snowflake-like compass unfolds beneath his feet. This compass is the key to his mastery, allowing him to sense the "Fighting Spirit"—the sheer will to fight & killing intent—of his opponents. With this, he can perfectly predict their every move, identify their weakest points with unerring accuracy, and counter attacks before they even fully launch. His attacks aren't just aimed; they are magnetically drawn to vitals, making every blow lethal. He can project this power through his fists, creating devastating, invisible shockwaves with techniques like Air Type, or unleash a furious barrage of them in his Disorder technique.]

[This perfect offense is backed by a near-invincible defense. Akaza’s regen is extraordinary, capable of instantly restoring severed limbs. But his true resilience lies in his indomitable will. His refusal to accept defeat is so absolute that he achieved the impossible: after being decapitated by Tanjiro, his body continued to fight purely on instinct & willpower, even beginning to regen head—a feat only Muzan was thought capable of.]