Well, without knowing which specific novel you're referring to, it's hard to give a detailed analysis. Generally, a character's death scene can be a very impactful moment in a novel. It might be used to create a sense of tragedy, to further the plot by removing a key figure, or to evoke strong emotions in the reader. For example, if Han was a heroic character, his death could be a sacrifice that stirs up feelings of admiration and sadness at the same time.
In the death scene of Vincent in Pulp Fiction, it is a sudden and shocking moment. The misfortune that befalls him while he is in the bathroom shows the unexpected nature of the movie's events. It also adds to the overall chaotic and unpredictable atmosphere of the story.
Well, in the novel, Dracula's death scene is quite significant. It's the end result of a long and arduous struggle. The characters who oppose Dracula have to go through a lot of challenges to reach this point. His death is often described with a great deal of detail, from the final blow that kills him to the reaction of those around. It's a moment that ties up many of the loose ends in the story and gives a sense of closure. It also has a symbolic meaning, representing the defeat of the ancient and evil force that Dracula embodies.
You need to build up the tension before the death. Make the reader care about the character. And describe the moment of death vividly but not too graphically.
One idea could be a rengoku fanfic where he trains a new group of young slayers. It could focus on his unique teaching methods and how he instills his values in them.