An independent, strong-minded, passionate and dedicated young teacher from the city. Elizabeth finds herself in Coal Valley, a small community on the Canadian frontier in need of a teacher. She quickly discovers that Coal Valley is not an easy place to live, and lacks the creature comforts and luxuries of her privileged life with her family.
- The Heart: She has an optimistic outlook and brings joy to the mourning town. Her students even made her a letter that said that she brought sunshine to their lives.
- Hot Teacher: She is very pretty and a teacher.
- Spirited Young Lady: Elizabeth is independent, vivacious, outspoken, kind and has high morals.
A laidback country boy. As a Mountie, and a man of stout character and integrity, he often finds himself protecting and saving people.
- Defrosting Ice Queen: Male version. It takes him some time to open up to Elizabeth, due to blaming her for his dead-end post at Coal Valley, but when he does he proves himself to be a Nice Guy.
- Nice Guy: Has noble intentions, is well-mannered and has a strong moral code.
- No Social Skills: Visibly has difficulty in paying compliments or asking Elizabeth out, though he gradually gets better.
A Coal Valley woman who tragically lost her husband and son in the mining accident. Abigail is a very kind woman, but she stands strongly for the things she believes in. She is one of the first women to welcome Elizabeth.
- Determined Widow: She tragically lost her husband in the mining accident. She never gives up despite her losses.
- Put on a Bus: Suddenly leaves the show to care for her sick mother, as revealed in a letter.
Rosemary "Rosie" LeVeaux
A flamboyant, enthusiastic actress from New York. She was brifly engaged to Jack Thornton, but they both realized that it wouldn't work out. Rosie immediately disliked Elizabeth and viewed her as "the competition".
- Bitch in Sheep's Clothing: Acts this way when she is initially introduced, as she sees Elizabeth as her competition for Jack's heart. This mellows out as she eventually finds a new love interest.
- Drama Queen: Rosemary loves drama and needs to be the centre of attention at all times.
- Fatal Flaw: Owing to her actress background, Rosemary has a bad tendency to value style over substance. This constantly leads to, not only problems for herself, but for those she involves.
- Hidden Depths: For a City Mouse, she has numerous useful skills for living on the frontier, including sewing and cooking.
- It's All About Me: Rosemary's first priority is always to aggrandize herself. When she was tasked with producing a school play, the "script" she provided had the children singing her praises.
Elizabeth's hopeless romantic younger sister who often gets herself into sticky situations by falling head over heels for men who aren't quite what they seem.
- Fiery Red Head: The most spirited of the Thatcher sisters.
- Manchild: She acts more like a flighty teenager than a grown woman, a result of being spoiled rotten since childhood.
- Thinks Like a Romance Novel: Julie is constantly trying to live the exciting life of romantic heroine, which is probably why she falls so quickly for the first bad boy type she meets.