Well, that can vary greatly. Some mangas might have their main characters die in dramatic ways for plot twists, while others keep them alive throughout. You'd need to be more specific about the manga you have in mind.
It's hard to say without knowing the specific manga. Many mangas keep the main character alive to drive the story forward, but there are some where unexpected deaths occur to add shock value or change the course of the narrative.
Not sure. It depends on which manga you're referring to. Different mangas have different storylines and character fates.
I'm not sure. You might have to read the manga yourself to find out for sure.
It depends on which comic you're referring to. Some comics have the main character survive till the end, while in others, they might meet an untimely end.
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.
Sure, Dio meets his end in the manga. His demise is a significant plot point and has a major impact on the story's development.
Bulma survives in the manga. Her presence is significant and she remains an integral part of the plot. The story doesn't have her dying.
Definitely not. Bakugou is still alive and kicking in the manga. The creators have kept him around to drive the story forward and engage the readers with his dynamic personality and actions.