John is the main character of I AM NUMBER FOUR. He used to live on the planet Lorien until he and eight other children were sent to earth to escape the Mogadorians. He is tired of all the running from the Mogadorians but he knows it is necessary. His and Henri’s most recent move was from Southern Florida to Paradise, Ohio. In Ohio he meets Sarah Hart, the love of his life; the only problem with this is that she has an ex-boyfriend who hasn’t quite gotten over their break up. He meets a boy named Sam who he becomes good friends with. He has a pet Chimæra, an animal that can change forms. He used to called him Hadley but now is named Bernie Kosar. At the beginning of the book, John is tired of running and just wants to be normal but he changes and wants to fight and defeat the Mogadorians.
Henri Smith
Henri Smith is Four’s Cêpan. He came to earth along with Four. His job is to protect John and do whatever he can to help the others. Henri is devoted to saving the Loric, restoring their planet and defeating the Mogadorians. He does not have powers like John or Six but his role is just as important. He plans where he and John will live next and scours the internet for the slightest sign that they may have been caught and will have to move. He makes fake documents for them. Henri is willing to sacrifice himself for John or the Loric.
The Mogadorians
The Mogadorians are an evil alien race who destroyed their own planet. They polluted it to the point that it simply died. They continued to use things that were killing their planet such as guns and gas running vehicles. They ignored the signs Mogadore(their home planet) was giving them that it was going to die. After destroying their own planet they went on and attacked Lorien killing everything on the planet for it resources but the Loric had a secret plan, in case of attack they had designated nine young children and their cêpan to escape an a secret ship and go hide on Earth. That’s how why Four, Six and Henri are on earth. They attacked when the planet and people were weakest and they follow one merciless leader, Setrákus Ra. The few remaining Loric believe that the Mogadorians will attack Earth and plan to use it as a permanent home.
Sarah Hart
Sarah Hart is an ex-cheerleader and Mark James’ ex-girlfriend. Sarah broke up with Mark because she had started acting like a jerk and her grades were dropping. Before she dumped him her mother sent her off to visit a relative. While she was there she started taking photos and realised how much she loved photography and when she returned home she dumped Mark. Her mother is the real-estate agent who sold John’s house to Henri. She is very nice and the day when John starts at school he immediately falls in love with her because she is so beautiful and kind.
Bernie Kosar
Bernie Kosar or Hadley, was John’s pet on Lorien. When they left Lorien, they brought him with them and he has been following John around protecting him. Being a chimæra, he can change to different animals. When they stay in Florida he takes the form of a gecko and a beagle in Ohio.
Six/ Teresa Palmer
Six is a skilled warrior and wants to kill the Mogadorians. She is hunting down the other Loric to reunite with them and make a stand against the Mogs and she starts with Four because he is next. She drives a red motorcycle. Her Cêpan, Katarina, was tortured and killed by the Mogadorians right in front of her. She shows up in the nick of time saving John and others from the Mogs. Six is extremely tough and will and has killed. She and John are both from Lorien like all the other Nine but her and John’s parent knew each other and they played together as kids and their parents joked that it was destiny for them to fall in love. Maybe it is destiny.
Sam Goode
Sam Goode is a nerd at the high school in Paradise, Ohio. He is obsessed with aliens and outer space because years ago his father disappeared without a trace when he was going for groceries at the store. Sam believes that he was abducted by aliens. His father’s glasses were found beside his truck at the grocery store making look like he had just disappeared. Every month, Sam orders magazines on alien conspiracy theories. Sam’s father was one of the few people on Earth that know of the Loric and was one of the humans that assisted the Loric nine when they landed on earth after the Mogadorian attack on their planet.
Mark James
Mark James lives in Paradise, Ohio. He dated Sarah for a while but she dumped him because it was turning her into a bad person. He is the quarterback on the school’s football team. His father is the town sheriff and he is a big deal in Paradise. He is a bully and when Four starts at the school he immediately hates him and trips and shoves him simply because he was talking to Sarah. He doesn’t get in trouble because he is the principal’s star and has won many awards for the school. He is not a good guy but when he faces reality he shows his true good nature.
Mogadorian Beasts
The Mogadorians have monstrous creatures that they brought from Mogadore. Two types of the beasts are Kraul and Piken. When Lorien was attacked, these creatures played a large part in the Loric loss. The Loric may have been able to defeat the Mogadorian soldiers, but they could not win against both the creatures and soldiers. The beasts are massive and repulsive. They are kept in horrid conditions and hate the Mogadorians as much as they do the Loric.