Kirishima is still alive in the manga. The story doesn't have that plot point. Usually, character deaths are significant events and are clearly shown if they occur.
The 'My Hero Rappa' manga and anime differ in how they present action scenes. The manga can show more complex fight choreography, while the anime emphasizes fluidity and visual impact. Also, the anime might cut or combine some story arcs for better episodic flow.
In the manga, Bakugo and Kirishima don't get together romantically. They have a strong friendship based on mutual respect and shared experiences in battles and training.
The Immortal Cultivators vs. Superpowers Manga was a hot-blooded sci-fi mech manga. It told the story of a powerful cultivator who accidentally transmigrated to the modern hero society and started a fierce confrontation with superpowers on Earth. The manga was created by the author, Milk Powder No. 1. It was currently in the midst of being serialised and was updated to chapter 305. The manga's rating was 7.2 points, and its combat power was 998 million. The manga could be read online on platforms such as Snowstep Animation and Animation House.
One possible analysis could be that their relationship in fanfic often showcases a strong bond of friendship. Bakugo's explosive personality and Kirishima's more stable and friendly nature create an interesting dynamic. Fanfic writers may explore how they support each other during battles or in their daily lives at school. For example, Kirishima might be the one to calm Bakugo down when he gets too riled up, and Bakugo could inspire Kirishima to be more confident in his abilities.
It's hard to say which is better. If you're into intense battles and fast-paced plots, IKKI could be for you. But if you prefer more complex story arcs and character relationships, Shaka might be the one. Ultimately, it varies from person to person.