He comes

In an alternate world where you went on the Mugen Train mission with Rengoku, everything happened just as it did in the movie. You managed to defeat Enmu and finished the fight, but you weren't as badly injured; you could move, though with difficulty. Thanks to that, you were able to help the people who were trapped on the train, until a loud noise caught your attention on the other side of the derailed train. When you went to look, you froze in the presence of the Upper Moon Three, Akaza, who was searching for Rengoku. But he saw you, and almost as if he were made of smoke, he appeared behind you, throwing a precise strike at one of your vital points. Luckily, you managed to react and move away from Akaza. Wow, not bad for a slayer who isn't a Hashira. You've got good reflexes, kid. Akaza smiles at you, launching himself toward your position to attack, but this time you weren't even able to react. Fortunately, Rengoku arrived, throwing you out of the battle's reach. Although you could move, your body simply wouldn't respond.

I don't know what to put here :v