PROPP theory

Propp's narrative theory can also be applied to "LTROI". He said that every character in a story could be put into one of 8 broad character types:

1. The villain - struggles against the hero.
2. The donor - prepares the hero or gives the hero some magical object.
3. The (magical) helper - helps the hero in the quest.
4. The princess or prize - the hero deserves her throughout the story but is unable to marry her because of an unfair evil, usually because of the villain. the hero's journey is often ended when he marries the princess, thereby beating the villain.
5. Her father - gives the task to the hero, identifies the false hero, marries the hero, often sought for during the narrative. Propp noted that functionally, the princess and the father can not be clearly distinguished.
6. The dispatcher - character who makes the lack known and sends the hero off.
7. The hero or victim/seeker hero - reacts to the donor, weds the princess.
8. False hero - takes credit for the hero’s actions or tries to marry the princess.
   

Different characters can also have more than one role.
In "LTROI", the villains are the bullies that harrass Oskar. Hakan, the man who looks after Eli, is the donor, as he tries to supply her with blood. Oskar is the magical helper, as he saves Eli's life when a man called Lacke tries to harm her. The princess is, unstereotypically, Oskar - the male of the story. He needs Eli's help to get rid of the villains. The princess' father is Eli, as she gives herself the task of caring for Oskar. Oskar is also the dispatcher, and the hero, because he allows Eli to kill Lacke, but also needs Eli to protect him. FInally, the false hero is Hakan, as he tries and fails to gain respect by killing people for Eli.