His orphan upbringing is key. Growing up without parents, he lacked love and support, which might have contributed to his later evil nature. Also, his time at Hogwarts where he delved into dark magic. And of course, the discovery of his connection to Salazar Slytherin, which influenced his beliefs in pure - blood supremacy.
One important element is his mother's family history. Being related to Slytherin set him on a path of exploring the darker side of magic. His time as a student at Hogwarts was also crucial. He learned about magic there but was more interested in the Dark Arts. His ambition for immortality and the creation of Horcruxes were significant steps in his transformation into Voldemort.
Well, first of all, his mother's situation is crucial. Merope Gaunt using a love potion on a Muggle to conceive Tom. Then, his orphanage days where he was a bit of an oddball. His entry into Hogwarts and being sorted into Slytherin is important too. Slytherin's influence on him regarding pure - blood ideology. And of course, his growing interest in the Dark Arts which gradually shaped him into Voldemort.
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 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.
One key element is Tony Soprano's dual life. He's a mobster but also a family man. Another is the power struggles within the mob. There are different factions vying for control. Family loyalty, or the lack of it in some cases, is also a big part of it.
One of the key elements is my love for music. Since I was a child, I've been drawn to music. I would listen to all kinds of music, from classical to rock. This love for music has been a constant in my back story. It has given me an emotional outlet and also influenced my taste in other aspects of life.
One key element is his origin on Titan which was in crisis. Another is his radical solution for population control. Also, the rejection of his idea on Titan which pushed him towards a more extreme path.