If you liked the Elfen Lied manga, the Anime-Planet community thinks you'd like:
Power corrupts, and absolute power corrupts absolutely. Top-ranked student Yagami Light is disenchanted with the world around him. Through a series of events, he comes into possession of the ultimate power over life and death: a supernatural "death note" which can kill nearly anyone at his whim. As Light sets off on a crusade-turned-killing-spree, investigators from a police task force try to stop the mysterious deaths - including Light's own father, a senior policeman.
Elfen Lied and Death Note involve the morally skewed notion of murdering people ruthlessly. Each series is deliberately made to be graphically morbid throughout. The murders also take place in unnatural ways while demonstrating the grotesque mindset of the killers.
The two main male characters in Elfen Lied and Fate Stay Night have similarities in their individual characters. They both demonstrate a sense of wanting to protect the women in their lives at all costs and sacrifice whatever they can to help them.
When the infected approached Rei and Takashi's school, it led to a gruesome blood bath that left the majority of students and staff dead or turned into the zombie-like monsters that have spread throughout the world. Together with a handful of other survivors, Rei and Takashi set forth to find their families in a world that is rapidly detoriating. Governments have collapsed, the killer disease is out of control, and people everywhere are trying their best to simply live through each day...
Action packed gore and violence are seen in High School of the Dead and Elfen Lied. Each series involving high school aged people taking on some element of the undead or supernatural. Both series with graphic scenes of the gore and ecchi nature for some entertainment.
Talented art student Eiri works part time at an antique store, where many of the items on sale are said to 'have a story behind them'. Recently, he has been having visions of a beautiful yet sad-looking young girl named Cossette. These visions lead him to the stock room, where he finds an unfinished painting of the girl. The former owners of the painting all died in bizarre ways, and according to Cossette it is only one of many of her former belongings - belongings that remember her, that bind her to this Earth, that will continue to drive people mad. That is, unless Eiri can save Cossette from her eternal suffering...
Taking violence and turning it into a thing of beauty is quite a skill that is achieved by both Elfen Lied and Le Portrait de Petit Cossette. These two series are filled with dark looming undertones mixed with cute, innocent looking girls.
Tate Yuuichi has just transferred to Fuka Academy and is thrilled at the prospect of living in a normal co-ed environment. Little did he know that he enrolled in a school where all-out battles between female students are nothing out of the ordinary! On his first day Tate unwittingly stumbles into the middle of a fight between Mai and Natsuki – two of the ‘HIMEs’, a group of specially selected and powerful girls recruited to fight monsters known as Orphans. While the HIMEs themselves are strong, they can only unlock their true power when they partner up with their ‘Key’. Unluckily for Tate he finds that he is not only the Key for Mai but also Natsuki! Now Tate is entering a world of monsters, battles and even rival HIME groups, but that’s only the start of his troubles…
Right off the back in Elfen Lied and My-Hime horrible things happen or have happened to the main characters. Their struggle during the time of the series is how they have to deal with the hardships they have already faced and the challenges that they will face for the rest of their lives