Jane TurnkeyJane is a 12-year-old squire training to be the first female knight. Originally born into a middle-class family and destined for a life as a lady-in-waiting, she yearns to "battle fire-breathing dragons." Upon hearing that the prince has been kidnapped by one such creature, Jane sets out to slay the dragon and rescue the prince — only to find that the dragon is the friendly sort and only took the prince in hopes that he would decipher the runes painted on his cave walls. Jane and the dragon (creatively named "Dragon") become fast friends, and she promises to help him decipher the runes instead. For her courage in saving the young prince, she is allowed to train to be a knight under Sir Theodore.
DragonA 300-year-old dragon that lives in a cave on a neighboring mountain. Dragon and Jane become best friends after she storms his cave to rescue the kidnapped prince. Dragon has quite a sense of humor, enjoys teasing Jane and her friends, and is the source of most of the series' comic relief. However, he is also fiercely loyal to Jane and never hesitates to defend her when she's in trouble, whether that involves interfering with sparring matches in her favor (much to her chagrin), flying to a mountain to rescue her despite being ill, or threatening a character with physical harm if he doesn't reciprocate her supposed feelings for him (also to her chagrin). He has a bit of a superiority complex about being a dragon and refers to humans as "shortlives."
JesterJester, whose real name he keeps a secret, is the 14-year-old royal court jester. His duties include dancing, singing lais, and entertaining the denizens of the castle with his quick wit (although many of his jokes fly over their heads). He has a close friendship with Jane and is even revealed to harbor romantic feelings for her. Jester's cleverness sometimes helps her get out of tough situations.
Gunther BreechGunther is Jane's 14-year-old fellow knight-in-training and bitter rival. Gunther is a competent (though very smug) squire and usually relies on his strength to best Jane in their sparring matches and other contests. When this fails, he falls back on more underhanded means, usually at the urging of his merchant father. In spite of this, Gunther is shown to have a conscience and usually ends up acting morally by the end of the episode. He trains under the knight Sir Ivon.
Rake13-year-old Rake is the royal gardener. Meek and introverted, he devotes himself to his craft and is enthusiastic about all things green. Rake and the royal cook, Pepper, are openly affectionate, making them the only official couple among the main characters.
Pepper12-year old Pepper is the royal cook. She is ever-cheerful and believes there's nothing better than a group of friends enjoying a good meal together. Pepper is openly affectionate with Rake the gardener.
SmithyThe 14-year old blacksmith. His actual name is Jethro. Smithy is one of the more mature characters and has a soft spot for animals, especially pigs. He has a pig (also creatively named "Pig") of his own that he claims to care for as much as Jane cares for Dragon. Like Jane and Gunther, Smithy is subordinate to Sir Theodore and Sir Ivon.
Sir TheodoreJane's mentor, a wise, aging knight who is tasked with giving the young squires instruction along with Sir Ivon. He is a stern teacher and doesn't accept any deviation from the knightly code or any hint of disloyalty to the King. Sir Theodore is shown to have great faith in Jane's abilities but is certainly not beyond doling out punishment that he feels is needed.
Sir IvonGunther's mentor, a portly knight with a thick Scottish accent. In contrast to Sir Theodore, he is boisterous, excitable, clumsy, and short-tempered. He also has less of a moral backbone than his colleague and is shown accepting bribes from Gunther's father to help Gunther excel at his training. Sir Ivon has a fascination with fighting and weapons and is often seen building bigger and more brutal tools of war, though none of them work.
King CaradocThe King of Kippernia. As the ruler, his word is above law, though he tries to maintain a semblance of fairness when dealing with his subjects. King Caradoc is especially protective of his children, Cuthbert and Lavinia.
Queen GwendolynThe Queen of Kippernia. She occasionally appears in the series, usually only to tend to the children. She may have had a hand in getting the King to accept the idea of allowing Jane to train as a knight.
Prince CuthbertThe eight-year-old heir to the throne. He was born a sickly child and quickly came to expect the devotion and attention he got from his parents and the court staff long after he got better. Cuthbert resented the birth of his sister, since it took attention away from him. In the series, he is portrayed as a surly and selfish boy who, like his sister, is used to getting his way. Because of this, he is often made fun of by Dragon (though never to his face). He has a soft spot for animals.
Princess LaviniaThe King's six-year-old daughter. Lavinia, like most six-year-olds, is curious and meddlesome, loves to play, and has a knack for getting into trouble. She idolizes Jane, who has a talent for communicating with her even through her wild flights of fancy. Lavinia often uses her status as royalty to get the other denizens of the castle to play with her.
Magnus BreechGunther's father, also known as "The Merchant." He is the only true villain on the show, and his presence usually signals some devious scheme is incoming. Greedy and unscrupulous, he has a sharp eye for opportunities to either make money, help his son cheat at his knightly tasks, or get Dragon banned from the castle. The absence of his wife is one of the unexplained mysteries of the series. Since he reacts angrily whenever Gunther asks about her, it can only be assumed that he was somehow involved in her death or abandonment.