BE WARNED! MAJOR SPOILERS FOR ALL THREE SEASONS
Snow White/Mary Margaret Blanchard: Snow White is the daughter of King Leopold and Queen Eva. As a young girl, her mother died from a disease from a sorceress named Cora. Soon after a young woman named Regina saved her from a horse accident. Snow White didn't know she was her worst enemy at the time. How Regina became her enemy was that she told a secret that her boyfriend Daniel was going to run away from home to be together. Then Cora found out then ripped his heart out and crushed it. when Snow got older she was a bandit for a living. Soon after she met her future husband Prince Charming.
Prince Charming/ David Nolan: David is one of two twins born to Ruth and an unnamed Shepard. Unknown to David, his twin was given to King George via Rumplestitlskin. After his brother James is slain fighting a dragon, David pretends to be his brother in exchange for his mother's safety and prosperity. As the assumed Prince , he leads the Knights to a dragon's lair. Though he is given strict orders to let the knights handle the dragon, the misfortune that befalls them leads him to killing the dragon. King Midas is so pleased by his bravery, that he offers his daughter Princess Abigail as reward. David, in favor of true love, prepares to decline Midas's generous offer, but is stopped dead in his tracks after King George threatens to kill his mother if he does not accept (The Shepard) Some time later, while on the way to Midas's kingdom, a bandit attacks his carriage and takes a bag of precious jewels including his mother's wedding ring. The bandit is later revealed to be a fugitive Snow White who has been running from the queen. After a fight Snow gives him his nickname "charming". Eventually Snow decides to help him and after an adventure the two fall in love, but go their seperate ways (Snow Falls) Charming continues on with Abigail but is unable to stop thinking about Snow. Unable to get the princess out of his head, he sends Snow a letter asking her to run away with him. She meets him and tells him she doesn't love him and he is heartbroken but unwilling to give up. Abigail gives him her blessing to be with Snow and tells him she too is in love with someone else. She agrees to break off the marriage if he helps her free the man she loves Sir Fredrick. He agrees and the two go on a quest to get water from Lake Nostos which is known for its healing properties. After wrestling with a siren he kills her and takes the water, freeing Fredrick from his prison. Abigail and Charming go their separate ways and he heads off to find Snow White (What Happened to Fredrick). Snow and Charming continue to separated until he finally finds her and wakes her from a sleeping curse. He helps Snow take back her kingdom from Regina. He and Snow get married and later bring Emma into the world. When she is born he has only a few minutes with her before being forced to send her through the magic wardrobe with nothing but his hope that his daughter will one day save them from the curse.
Emma Swan: Emma was born in the enchanted forest by her loving mother and father Snow White and Prince Charming. in the enchanted forest a curse was cast from the evil queen so when Emma was born she had to go in a magical wardrobe. Sadly they saw her once. then she teleported to the real world and a boy named Pinnochio took her to an orphanage then left with another orphan. Then later she met a man named Neal in a car she stole. then Neal ran away from Emma then a cop found Emma with a stolen watch. Then she went to prison then realized she was pregnant with a baby named Henry. She said she couldn't be a mom. suddenly Henry runs to Boston to get his mom back. Emma is freaked out about that and goes with Henry to Storybrooke.
Henry: Henry was born from his mom Emma Swan. He was put up for adoption because Emma could not take care of him. Soon a woman named Regina adopted him. She took him to a town named Storybrooke. She was very nice to him. She only cared about him no one else. later Henry went to Boston to get his birth mother. He brought her to Storybrooke to break the curse. Henry got a book from Mary Margret at school. Henry is not very bright.