Orphanage Little Girl

The unnamed orphanage girl is a character who originated from the anime Elfen Lied & a minor villain. Despite she "befiended" Lucy, she later betrays her in which is highly considered by many fans stating that she really is a villain, being responsible for turning Lucy into a psychopath.

Elfen Lied
Little is known about the girl's origins but she is first shown "befriending" Lucy by protecting & aiding her against the bullies. Lucy trusted her at first since she consider her a true friend & after a few days later, Lucy introduces her pet puppy to her & then told her to keep it a secret. She later realized she had not nearly enough food to feed it, and thus went to the human girl for help out of necessity. She made a promise to Kaede not to tell anyone about the animal, knowing full well that if she did, the puppy would most likely be tortured as well. However, this is later proven to be a mistake as she later told the bullies about Lucy's puppy by questioning, the girl was loose-lipped or she is possibly working for them all along to expose Lucy's secret so that they can make fun of her by betraying her later. As Lucy enters the room, she is shocked to see Tomoo bringing the puppy with him alongside with the girl & she is forced to watch Tomoo kill the innocent puppy. The girl is then revealed by her betrayal by doing an enigmatic evil grin, which is high questionable to be either an illusion on Lucy's mind or she really did it on purpose. Lucy enraged by this, loses control of her vertors thus killing everyone in the room including the girl by being mutilated. Although she already died, the girl still appears as a hallucination in Lucy's mind tormenting her.

Trivia

 * The orphanage girl, alongside with the bullies are very similar to Chris Hargensen & Billy Nolan, both bullied the protagonist turning them into psychopaths, both are later killed by the protagonist as a revenge & both later appeared as hallucinations in the protagonist's mind. Like Chris Hargensen in the 2002 version of Carrie, both somewhat show a huge regret on ruining the protagonist's life only to be forced by their allies.
 * Many fans have highly hated the orphanage girl, in which many opinions believed that she really did betray Lucy on purpose.
 * There are many theories that are believed about the orphanage girl's occupation, stating that she could be either loose-lipped, a master manipulator, a trickster or she could have been actually friends with the bullies in which she only pretended to befriend Lucy so that they can bully her even more.