Does Rengoku die in the manga?

Yes, Rengoku did die in the manga.

Rengoku doesn't turn into a demon in the manga. His character arc stays true to his heroic nature and doesn't involve any demonic changes.

No, Rengoku's death was not related to the difficulty of drawing him. It was a part of the story's plot and character development.

Rengoku remains deceased in the manga. His character's fate is set, and there's no resurrection. It adds depth and gravity to the narrative.

No, Rengoku is not alive in the manga. He tragically died during a battle.

I'm not sure. You might have to read the manga yourself to find out for sure.

No, Levi doesn't die in the manga. His fate is different from what some might expect.

Kaeya doesn't die. The manga continues with him as an active and present character. His storyline progresses without such a fatal event.

No, Inosuke doesn't die in the manga. The story keeps him alive throughout.

No, she doesn't. The story doesn't have her dying.