From Demon Slayer to the Myriad Worlds

Altair is still a bit nonsense. As a world where you can be invincible depending on the setting, the protagonist's strongest ability should be Aizen's Kyoka Suigetsu to change the world's perception and allow them to create an absolutely invincible character.

The author's writing style and plot arrangements are improving at a speed visible to the naked eye, and you can look forward to it.