"Rosalie is a prominent character in the Japanese manga ""Sekai Saikou no Ansatsusha"". She appears throughout the story as a highly skilled assassin who operates in the shadows. Rosalie is a beautiful woman with long blonde hair and piercing green eyes. Her appearance is often deceiving, as she uses her looks to lure in unsuspecting targets.

Rosalie is a member of the underground organization known as ""Nightmare"". This group is notorious for their ability to carry out complex assassinations without being detected. Rosalie is one of the best assassins in the organization, and her skill with a sniper rifle is unmatched.

Despite her cold exterior and ruthless approach to her work, Rosalie is a complex character with a tragic past. She grew up in poverty and was forced to become an assassin at a young age. This has left her with a deep sense of loneliness and a reluctance to trust others. However, as the story progresses, Rosalie begins to open up to others and forms close bonds with her fellow assassins.

Rosalie's primary goal throughout the story is to seek revenge against those who wronged her in the past. This leads her on a dangerous mission to take down a powerful crime syndicate that has ties to her past. Along the way, Rosalie faces many challenges and puts herself in harm's way to accomplish her mission.

Overall, Rosalie is a fascinating character with many layers. She is highly skilled, yet emotionally guarded. Her tragedy makes her relatable and sympathetic, and her determination makes her a formidable opponent. Fans of the manga will undoubtedly enjoy following Rosalie's journey."