Long Live The Queen is a collection of Elfen Lied fan fiction written by fellow Troper Gojirob. It's essentially an after-story tale about the fate of the surviving manga's main characters after the events of the series up to Lucy's tragic death...
Unmarked spoilers for the manga from this point onward.
Part 0: Stillpoint of Destruction (Complete): Chronologically the first. Lucy and Nyu have left their dying body, and only the DNA Voice remains, intent on bringing the world down around her. Told from the Voice's point of view, can anything stop this force of pure hate? Partly based on 'The Seventh Wave' by Sting.
Part 1: Long Live Lucy! (Complete): Kouta kept his dreadful promise. Now, as Nyu's family mourns her loss and her enemies try and take in a mixed victory, is Lucy really done with the world? She will not pass without notice.
Elfen Liner Notes: Building My Nephew's Harem (Complete): Haunted by memories of the night Lucy murdered her family members, Yuka's mother makes a devil's deal to find out if Nana poses a threat as well. But is this deal what it seems, and will her own family history prove more shocking still?
Part 2: Anna and the would-be King (Complete): Anna Kakuzawa is made to realize the sins of her family, struggles to put them right, and gains a new home.
Part 3: So shines a good deed (Complete): A small act of decency once saved a life; Repaying that act may not be so easy.
Part 4: Kouta's Birthday Gift (Complete): Yuka learns the secret someone close has been keeping, and it causes her to jump to conclusions.
Part 5: Nana and the lucky girl (Complete): Nana's chance meeting with a small child causes her to meet two people she never thought she would.
Part 6: Sisters we are! (Complete): Nana continues her joy from 'Lucky Girl', but a greater shock is waiting for Mayu when she accompanies her friend. Meanwhile, Kouta and Kurama gain a huge insight into Lucy's past and correct an old wrong. But a discovery emerges that will truly begin the Diclonius War.
Part 7: Folly... (Dormant): A rogue state has its own Diclonius, and the power once closest to it feels its hand is forced. Kouta faces a challenging new job and a very crowded Maple House. The girls change their sights; Yuka makes a choice. The War Of The Horns begins in earnest.