X Drake began as a Marine. For some reason, he decided to go undercover in the Beasts Pirates. His devil fruit power is a big part of his identity. He's in a tricky situation, trying to do something while being part of the pirate crew.
Sure. X Drake used to be part of the Marines. But then he joined the Beasts Pirates secretly. He's got the Ryu Ryu no Mi devil fruit. That's about it in a nutshell.
It might be about his upbringing and the environment that led him to adopt the playboy lifestyle. For instance, if he grew up in a wealthy family, it could have influenced his extravagant ways. Or if he had a difficult childhood, he might be using the playboy image as a form of escapism. There could also be a story behind his social circle and how it has contributed to his playboy persona.
Snoke was a major figure in the First Order. He had an interest in Kylo Ren and trained him. His own back story wasn't fully detailed, but he was a significant threat in the Star Wars story.
Sure. Rosalina was a girl who found a Luma and then journeyed through space, eventually becoming the caretaker of the Comet Observatory.
Grindelwald was an important figure in the wizarding world's history. He was once a promising young wizard. But he became power - hungry. He thought wizards were superior and should rule, which led to his dark deeds.
Casper's back story in brief is that he was once a human boy. After death, he turned into a ghost. However, he is different from other ghosts as he is friendly towards humans.
Kuromi is a Sanrio creation with a back story of being different. She's a bit of a troublemaker, and her story is centered around her non - conformist attitude compared to other Sanrio characters, especially in relation to My Melody.
Hodor was originally Wylis. When Bran was in a dangerous situation, he warged into Hodor's mind. This event somehow damaged Hodor's mind and left him only able to say 'Hodor'. It was a tragic event that changed Hodor's life completely.
Sure. Catwoman, Selina Kyle, often had a tough upbringing in Gotham. This led her to a life of stealing.
Sure. Selina Kyle is Catwoman. She grew up in hardship and turned to thieving. She's known for her cat - like skills and has a complex relationship with Batman.
The Terrifier is a horror icon. His back story has elements of him being a deranged and violent being. Not much is clear about his origin but he is known for his extreme acts of brutality.