Well, first of all, his origin in the Shadow Isles sets the stage. Then, the fact that he has been changed by the dark powers there into a being that is in league with the undead. His purpose of serving the greater will of the Shadow Isles' dark entities is another key. He is like a symbol of the Isles' power, constantly on the move to enforce the will of the darkness, whether it's through gathering souls or spreading fear among the living. His entire existence is a key part of the lore of the Shadow Isles as it showcases the kind of power and malevolence that exists there.
Hecarim is a centaur-like being from League of Legends. His back story involves being part of the Shadow Isles. He was once a proud and powerful being in a now - fallen kingdom. He serves the undead and is often associated with death and destruction. His loyalty to the powers of the Shadow Isles drives his actions in the game's lore.
As I don't know which Kino it is, I can't say for sure. But usually, key elements in a back story could be things like a major event that changed their life, like the loss of a loved one.
The key elements in Nakime's back story include her position among the Upper Moons. This gives her a certain level of power and influence within the demon world. Her biwa - playing ability is crucial as it allows her to control the Infinity Castle. This means she can create different areas, barriers, and even manipulate the terrain within the castle. Also, her connection to Muzan is an important aspect. It's likely that Muzan either turned her into a demon or recruited her, and she has remained loyal to him, following his orders in the demon - related affairs.
The key elements are her low - born status, her marriage to a noble, and the tests of loyalty. Her husband tests her in ways like separating her from her children.
In Marth's back story, his identity as a prince of Altea is fundamental. It sets the stage for his future actions. The invasion by Dolhr is a cataclysmic event that upends his life. This leads to his exile, during which he endures hardships and learns valuable skills. His relationships with other characters he meets during this time are also key elements. And of course, his quest to retake Altea and restore order is at the heart of his back story.
The key elements are his poor upbringing, his love for Daisy, and his pursuit of wealth. His early life in poverty drove his ambition. His love for Daisy was the main motivation behind his actions. And his quest for wealth, through whatever means, was to make himself acceptable to her.
His Inazuman heritage is a key element. It's where his family values and traditions come from. The political unrest in Inazuma that led to his leaving is also crucial. And his new life as a wandering samurai, exploring the world and having new experiences, is an important part of his back story as well. He also has his love for poetry which is a unique aspect of his character and is related to his upbringing in Inazuma.
The key elements are his cancer diagnosis, the secret experiment he joined, and his resulting superhuman healing factor.
One key element is her origin in Zaun. It's a place that shaped her. Another is her mental instability which grew over time. Also, her exposure to the rough and chaotic environment of Zaun is important.
As I don't know the specific Middy, I can't say for sure. But if Middy was a character in a coming - of - age story, perhaps key elements could be friendship, self - discovery, and facing family issues.