Does Ciel die in the manga?

Ciel remains alive throughout the Black Butler manga. The author has crafted the storyline in such a way that he survives and keeps the story going with his presence and actions.

Yes, Ciel does become a demon in the manga.

No, Sebastian doesn't kiss Ciel in the manga.

Yes, Ciel does turn into a demon in the manga.

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.

Nami doesn't die. The manga keeps her as a significant and surviving character with ongoing plot developments and adventures.