Molly Moon's name derives from the fact that she was found on the doorstep of Hardwick House, (later to be renamed Happiness House), in a Moon's Marshmallows box. In the first book, Molly learned to hypnotize people after discovering a book about hypnotism. Using her new-found hypnotic powers she travels to New York looking for Rocky and gains the part of the main character on a Broadway musical called Stars on Mars. She stole a part in the play and she kicks out the other girl. She hypnotizes all of the crew to think she was the best in the world.
In the second book, she travels to the United States and learns that her parents are Lucy Logan, the librarian in Briersville, and Primo Cell, an American businessman. She also discovers that she has the power to stop time with the help of her big, clear crystal.
In the third book, Molly and Petula the pug are kidnapped by a power-crazy Maharaja who wants to kill Molly so she can't be the greatest hypnotist ever. She learns the ability to time-travel using special crystals (red and green). Forest (a man she met in the second book who is a hippie) and Rocky are also kidnapped later. The maharaja takes several other Mollys (from different times) so Molly needs to fix time before her entire childhood changes forever.
In the fourth book, Molly has to rescue her twin brother from the future. She also discovers through strange circumstances, that she has the ability to mind read after having her hypnotic knowledge taken away from her, though she gets it back. The villain in this book is a supposedly six-year-old princess who has a plan to take over the world.
Molly also has a pet pug named Petula, who she rescued from Miss Adderstone in the first book. Petula is also a hypnotist and it is revealed near the end of the third book that she can also stop time. Petula enjoys sucking on stones.
Rocky's name derives partly from the pram he was found in the parking lot behind a police station, with "the Scarlet Rocker" printed on the hood. Surname of scarlet because of the name on the pram, and first name rocky, a shortened version of Rocker.
Rocky learned voice hypnotism from the same book as Molly by going to the Briersville library secretly. He eventually stopped going there and ripped out the two chapters about voice hypnosis. This prevented Molly from learning about it. His hypnotizing powers are fairly strong but he needs time for his hypnotism to take effect. He also appears to have a talent for singing.He also plays the guitar and befriends Billy Bob Bimble in the second book.
Rocky does not yet know who his parents are, unlike his best friend Molly, whose parents are Primo Cell and Lucy Logan. Also a friend with Molly Moon.
Micky is an eleven- year old boy with curly brown hair. He shows a striking resemblance to twin sister Molly and is very thin and bony. He is also very self-conscious and vain- often exaggerating his unfortunate, so- called "illness". In the third book, Molly discovers she has a lost twin. In the fourth book she takes Rocky and Petula, her hypnotising pug, with her to go find Micky, her twin. They go back in time, and find out that an evil, time traveling hypnotist named Redhorn had taken him to the future, precisely 500 years from where Molly lives. So the three follow him through time (Molly lassoing him with her crystals), and as they get closer to Micky, Molly finds out more about him. On the way to the future, Molly had picked up a strip of a hospital bracelet incompletely labeled " GAN TWIN", which he later uses as a "comfort rag Later on she noticed it was not a rag, but a bracelet, labeled: " ST. MICHAEL'S HOSPITAL MALE LO". WHen Molly put the two strips together, hers and Micky's it revealed " ST. MICHAEL'S HOSPITAL MALE LOGAN TWIN". Molly explained to her brother and surprisingly he believed her. After several conflicts and adventures in the future, Micky chooses to go with them, and since his first surname was ' Minus', he wanted to change it because it made him feel like nothing. So he changed it to Micky Moon, named after his sister, Molly Moon.
Molly first met him in book 3 when he stole her crystals for time travelling. They made a deal, and he returned them to her. Soon they became friends. Though Ojas is one of book 3's main characters, he appears only episodically in book 4. He always calls Molly «Mollee» probably because of Indian accent, though his English is close to perfect.
At the age of eleven, he learned how to steal goods. When he was an adult, he tricked an old lady into giving him her life's savings which she thought was for a stray-dog home. With that money, he bought his warehouses in Manhattan and started his business of dealing in smuggled goods.
After the Shorings Bank incident (see 'Plot' below) he was hypnotised by Rocky and told by Molly and Rocky to be kind and good. He was also hypnotised to have a German accent, as his original Chicago accent might be recognized by police (he told the police about the Shorings Bank incident on the phone).
Molly, in order to make him a better person,told him that he could have a budgerigar whenever he did a good deed.Between the first and second books, he managed to get twenty budgerigars by doing thoughtful deeds.His German accent (which Molly Moon hypnotized him to have) wore off at the end of the second book, and he now speaks in his original scruffy Chicago accent.
The Maharaja of Waqt is a power-crazy man who kidnaps 11-year-old Molly and her dog Petula, as well as four other younger Mollies and Petula as a puppy. His real name is unknown, so he is simply known as Waqt. He has a servant called Zackya, speaks in spoonerisms and he is the first enemy of Molly that doesn't get reformed. His name means Emperor of Time.
Princess Fang is a very brainy 6-year-old (aka a 60 year old who traveled to the Bubble of Light at the beginning of time to make herself younger) who comes from 26th century who lives on Mont Blanc but the country is not called Switzerland. She has Redhorn, a servant, kidnap Molly's twin brother, Micky, and has him hypnotise all the people of Lakeside. Fang owns a machine that can suck knowledge out of a person's head and put it into another's. The Princess hates everything ugly and old. Molly finally hypnotises her to serve the true King and his family. She has a speech impediment that makes her say most of her "r"s as "w"s, and she pronounces the "th" sound as "d".
Miss Adderstone is the headmistress of Hardwick House, and dislikes children, especially babies. She dislikes Molly Moon especially out of all the orphanage's children. Later on in the book, Molly hypnotises her to love planes and flying.
Agnes was absent during Book 2, but returned in Book 3 when Molly traveled back in time to return her past selves to their proper times. She was instructed to fart and burp in company, as well as to be kind to the children under her care when she was very drunk.
She was last seen flying in the Italian Alps with Edna at the end of Book 1.
She also owned Molly's dog Petula before Molly rescued her. Miss. Adderstone's current status is unknown.
Adderstone favors Hazel, because it is learned that she looked like her when she was dropped off on the doorstep of the Hardwick House.
In the beginning of the book 1, Adderstone hates Molly Moon. Later on, Molly hypnotizes her to love her and planes and flying.
In the second book, she was kidnapped by Primo Cell. After Cell's plan was stopped for good, she was supposedly hypnotized by Sinclair (Primo Cell's adopted son) to study as Forest's helper (It doesn't actually say that in the book). Her current status (as of Book 3-4) is unknown.
In the second book, she and Nockman fell in love and became engaged. She appears only episodically in the third book and doesn't turn up in the fourth one as Molly is in the past/ future for most of these books.
Her status at the end of the first book is unknown, but she was probably not fired due to what Gemma and Gerry told Molly in one of the last chapters of Book 1. However by Book 2 she was fired as Molly has hypnotized her to tell everyone that she was a horrid bullying teacher.
Hazel Hackersly is a thirteen-year-old girl. She has not-that-pretty looks and a whiny voice. She is the most favored by Miss Adderstone out of all the orphanage children. While Molly and Rocky were away, she took over Miss Adderstone's bedroom. At the end of the book, it is revealed that her mother was a drunk and her father was violent. When Hazel first came to the orphanage, Molly was kind to her, but she pushed her away saying that her parents had loved her, and they had died tragically. She was actually mean to Molly because she was jealous that Rocky and Molly had Mrs. Trinklebury to love them as a mother. In the second book, she dyes her hair platinum blonde and gets a walk-on part in an American film; thus, she has a fake American accent.
Roger Fibbin is a twelve-year-old boy. He is Hazel Hackersly's informant and spy, and updates her on all the goings-on behind her back. While Molly and Rocky were away, he took over the sanitorium after a big fight with Hazel. In the second book, it was revealed that he was hypnotised after seeing an argument between Cornelius and Lucy Logan. About a year later, Molly restored him to his normal self.
Ruby Able is a five-year-old girl and one of the few people who is actually nice to Molly at Hardwick House.
In the second book, it is revealed that she sticks her pictures up with bubble gum.
Jinx Eames is a five-year old boy who calls Molly by her real name. He is good friends with Ruby.
Gordon Boils is the second oldest at the Hardwick House. He is a messenger of Hazel Hackersly. Gordon invented the names 'Drono', 'Zono' and 'Bog Eyes' for Molly, and it is later discovered that these were key abilities for hypnotists.He is very strong.
Gerry Oakley is the best friend of Gemma. He is very eager. Gerry is six years old in first and first half of the second book.
Gemma Patel is the best friend of Gerry. Gemma is seven years old in first and first half of the second book. She was the one who found the copy of the hypnotism book in Book 2.
At the end Gemma is the one who tells Molly all that has happened at the Hardwick House.