I'm not sure about the exact key elements, but it might include things like its founders. Maybe it was founded by a group of visionaries who had a particular goal in mind for the city.
One key element could be its location. If it's related to Greek mythology, perhaps it's located in a place with special significance. Also, the people who live there could be a key element. Their traditions, values, and how they interact with each other might be part of the back story. For example, if they have a hierarchical society like the gods in Greek mythology, that would be an important part of the story.
In the full story of 'The Blood of Olympus', the key elements are numerous. Firstly, the journey of the seven demigods on the Argo II is central. They face various challenges during this journey. Secondly, the power struggle between the demigods and Gaea is a major aspect. Gaea is a formidable enemy with her own plans for the world. Thirdly, the relationships between the characters, both old friendships and new alliances, are important. These relationships are tested and strengthened throughout the story. The final battle against Gaea, which is filled with high - stakes action and magic, is also a crucial element.
One key element is Kratos himself. His character, his backstory, and his motivation drive the story. Another is the various monsters he battles, like the Hydra. The gods also play a crucial role as they give Kratos his missions and their actions and politics influence the events.
One key element is the wealthy setting. The 90210 zip code represents luxury. Another is the high - school aspect. The characters' experiences in school, like cliques and popularity contests. Also, relationships play a big part. There were romances and break - ups among the characters.
One key element is the nuclear apocalypse that destroyed Earth. Another is the Ark, the space station where the survivors were living. And of course, the 100 delinquents being sent to Earth.
One key element is the different races. Their relationships and power dynamics play a big role. Another is the political situation, with various kingdoms and factions. Magic is also a key, as it affects battles and the balance of power.
I'm sorry, I don't really know the specific story of Olympus City. It could be a fictional place, perhaps in a game or a creative writing piece. Maybe it's a city full of advanced technology and unique cultures.
One key element is its evolution from Gastly and Haunter. Another is its connection to shadows and darkness. Also, its mischievous nature is important.
The key elements are the Smurfs themselves, their forest village, and Gargamel. The Smurfs' unique characteristics and their village setting are important parts of the back story, and Gargamel as the main villain.
If it's Guts from 'Berserk', one key element is his origin from a hanged corpse, which sets him apart and makes his existence somewhat of an outcast from the start. Another is his time as a mercenary, where he learned combat skills and survival tactics in a harsh world.
One key element is his desire for power. Bowser wants to rule the Mushroom Kingdom. Another is his rivalry with Mario. Their battles are a big part of his story. Also, his relationship with Princess Peach, as he constantly tries to kidnap her. His army of minions is also an important part of his back story as they help him in his evil plans.