Below are the first few pages of a fantasy story I'm writing. Please let me know what you think of the story, plot, and of the first few pages specifically. They haven't gone through any editing yet.

The only opening in the tower wall was a single window; there was no door. It had been empty for years, although it was part of the queen’s castle. Dragons flew over it, and griffins paused on the roof to locate their prey. Fairies made their homes in the ivy that climbed the walls. No one guessed the secret that the tower held.
… Liliana gazed out of the window at the green fields that surrounded the castle. Flowers were blooming in the garden, and all she could do was lean far out of the window, smelling the flowers only when the wind blew the right way.
Liliana had been locked in the tower when she was three. She was now fifteen, and would be sixteen in a few days. Old enough to become the queen. She should be the queen. Her father, King Alfred, had left on a hunting trip when Liliana was a baby, and never returned. Her mother, Queen Maria, had disappeared shortly before Liliana was locked in the tower.
Liliana’s aunt was Queen now. She was the one who had locked Liliana in the tower. No one knew that Liliana was alive, except for a dragon named Carlonina and one of Grazillia’s servants, whose name was Annie.
Liliana leaned farther out of the window. She could see the wall that surrounded the castle, and beyond that, the enchanted forest that was half as big as the kingdom. To the northwest, the forest changed to pines and was in constant shadow. That was the Shadow forest, separated from the enchanted forest by a long canyon and barren fields. In the distance, mermaid lagoon sparkled in the sunlight.
Liliana glanced around as the breeze grew stronger. She spotted Carlonina flying towards the tower.
Liliana pushed herself away from the windowsill as Carlonina flew closer. Her wings still created a steady breeze, but she angled herself so it didn’t blow directly in Liliana’s face.
“What’s going on?” asked Liliana.
“Grazillia sent knights to attack King Jonathan’s kingdom,” said Carlonina.
“Just knights?”
“Ships, too,” said Carlonina. “Apparently someone from Jonathan’s kingdom came here and started asking a lot of questions. Grazillia assumed he was spying and decided to attack them before they could attack us.”
“That doesn’t sound like a good reason to attack,” said Liliana.
“I know,” said Carlonina. “And there are other reasons not to attack, too.”
“Like what?”
“Well, for starters, your father was King Jonathan’s brother,” said Carlonina.
“And if they want to, they can cut us off from the Green Sea, which means no fish. But Grazillia doesn’t care much about that, which is surprising since she likes fish. But that’s not why I’m here.”
“Then why are you here?” asked Liliana.
Carlonina glanced around, making sure no one was nearby. “Look, Grazillia’s in the castle right now, planning a way to take over King Jonathan’s kingdom.”
“Take over the entire kingdom! She’ll never manage that!”
“I know, but that’s not the point. She hasn’t been out of the castle since yesterday, and this is the perfect opportunity for you to escape the tower.”
“What are you talking about? What about Hue?”
“Grazillia’s dragon?”
“Do you know anyone else named Hue?” asked Liliana.
“Now that I think about it, yes. One of the knights. But Hue the dragon left for Jonathan’s kingdom yesterday, to create forest fires and so forth. And yes, I know how easily those fires could spread here. Anyway, he won’t be back for at least four days. Come on, Liliana, this is the perfect opportunity.”
“Are you sure about this?” asked Liliana, even though she wanted to escape more than anything else. “You really think we can pull this off?”
“Yes, I do,” said Carlonina impatiently. “But not if you don’t hurry up!”
“Okay,” said Liliana. She turned around and grabbed a bag that was lying on her bed and threw in another dress, an extra pair of shoes, and a few sheets of paper. After a quick decision, she left her inkwell behind, but took her pen, which was made from a peacock feather.
“What took you so long?” asked Carlonina, glancing nervously at the castle door. Two guards stood by the drawbridge, but seemed too bored to notice anything about the tower. Why should they look at the tower? Liliana thought. Not even Grazillia’s guards knew that someone lived there.
“Are you ready?” asked Carlonina.
Liliana nodded nervously. She was about to step on the windowsill when she turned around, and closed the curtains behind her. Once she left the tower, the curtains would fall right back into place, and hopefully no one would notice she was gone.
Liliana stood on the windowsill, closed her eyes, and jumped. Terrified, she fought back a scream, hoping she would land on Carlonina’s back. Clenching her fists and tightening her grip on her bag, she waited to feel something below her…
Liliana landed with a thud, swaying for a moment. Liliana opened her eyes and grabbed whatever was in front of her, which happened to be Carlonina’s tail. Great. She had landed backward.
Carefully gripping Carlonina’s back, Liliana turned herself around. Carlonina glanced again toward the guards at the drawbridge, then started flying towards the forest.
“Where are we going?” asked Liliana.
“Well, I’m going to get you somewhere safe and then get back to the palace as fast as I can. Grazillia will notice if I’m going for very long. You, however, are hiding with Christina.”
“Who’s— whoa —who’s Christina?” asked Liliana.
“She’s a unicorn that lives in the forest,” said Carlonina. “Her cave is probably the safest place for you to hide. And if you need to get anywhere fast, Christina lives with a flying horse named Brittani. She can fly almost as fast as I can, even though she’s not as big.”
“What about—whoa—dragons? Not purple ones like you—green ones the size of a house.” said Liliana. “Aren’t there tons of them in the forest?”
“Who told you that?” asked Carlonina. “Never mind who told you—you’ll be safe as long as you keep far away from the shadow forest.”
“Are there dragons there, then?” Liliana asked.
“No. Even worse creatures—fire monsters and so forth. The only thing you’ll have to watch out for in the Enchanted Forest are griffins. And Grazillia, of course.”
Before long, they reached the edge of the forest. Carlonina dropped downward until she was just above the treetops. Circling several times, she finally found a clearing where she could land.
“Christina’s cave is somewhere around here,” said Carlonina. “I think it’s this way…”
“And you’re wrong.” Liliana jumped at the sound of a voice behind her. She turned around and saw a unicorn standing at the edge of the clearing, pure white except for the single horn on her head, which was a golden-cream color.
“I thought dragons had an excellent sense of direction,” teased Christina. As Carlonina opened her mouth to protest, Christina turned to Liliana. “You’re Princess Liliana, aren’t you?”
Liliana’s eyes widened in shock. “Yes, I am—but how did you know?”
“Oh…” began Christina. “Well, let’s just say I have my sources. What have you seen of the kingdom so far?”
“Just the top of the forest,” confessed Liliana.
“Carlonina didn’t show you around? Never mind that. I’ll show you around later.”
“Liliana has to stay hidden,” said Carlonina. “If Grazillia finds her, we’re all in trouble.”
“If Grazillia finds her, we’re all probably dead,” said Christina. “Which is why I’ll be careful. Don’t worry, Carlonina. This isn’t the first time I’ve helped someone escape.”
Liliana tilted her head to one side curiously.
“Oh, yes,” said Christina. “I’ve been a part of the escape plans of at least three innocent shopkeepers who sold the wrong kind of book or artists who painted the wrong kind of painting. You know—books of songs about the days of King Peter, your grandfather, or paintings of King Alfred coming back and taking over his kingdom. Grazillia sees these as an insult.”
“And she locked them up for that?” asked Liliana, shocked.
“Yes, I’m afraid she did. I can’t help wishing one of those paintings would come to life—your father was only an average king, Liliana, but he was better than Grazillia.”
Liliana began to ask another question, but Carlonina spoke first.
“Look, Christina, I appreciate that you’re telling Liliana about the kingdom, but she really shouldn’t be here.”
“None of us should be here,” Christina interrupted. “We’ve helped people who are strictly against Grazillia so many times that we’re lucky to be alive.”
Carlonina sighed impatiently. “Look, Christina. If you could just make sure Liliana is safe for a few days, then I won’t ask you to do anything else. But I have to get going, or Grazillia will notice I’m gone.”
“Don’t worry, Carlonina,” said Christina. “We’ll be fine.”
“I wish I could believe you,” said Carlonina, jumping upward and flapping her wings. In moments, she was gone.
Liliana turned to Christina. “You don’t seem very worried about Grazillia finding us.”
“I’m not,” Christina said simply. “Worrying about something doesn’t change anything. If you hadn’t jumped out of the tower because you were worried you would fall, you wouldn’t be here.”
Not sure what to say, Liliana glanced around the forest. The trees were so tall…and so green. Nothing had seemed this beautiful from the tower. What was the rest of the kingdom like? She might never know, because Carlonina wanted her to stay hidden.
Christina seemed to guess where her thoughts were headed. “How would you like to see the kingdom? As soon as it gets dark, Brittani can show you around.”
“Tonight?” asked Liliana.
“Why not?” asked Christina. “But right now, we’d better get back to the cave. Brittani will wonder where we are.”
Liliana followed Christina through the forest. Her cave wasn’t far away. Under a large group of boulders, and well hidden by clumps of thorns and brambles, a narrow tunnel led into a wide cave.
As soon as they entered, a winged horse looked appeared from a tunnel that led farther back into the cave. Purplish-gray with blue-tinted feathers on her wings, she was almost as beautiful as Christina.
“Liliana, this is Brittani,” said Christina. She nodded towards the winged horse.
Brittani nodded in greeting. “I see Carlonina has finally helped you escape from the tower. Welcome! You’ll probably stay here for a few days, and then we’ll figure out which kingdom will be the safest for you to flee to.”
“You mean I’ll have to leave?” asked Liliana.
“Possibly,” said Christina. “But there’s also a chance you might not have to. But don’t worry about that for now. You can take a look around the cave if you’d like, but you’ll probably want to get some rest, especially if you’re going to be touring the kingdom tonight.”
Liliana nodded. Glancing around, she noticed that there wasn’t a bed in the cave. There were, however, a few piles of soft straw with blankets on top. Liliana laid down on one of these, and was asleep within minutes.

That's the first few pages! Let me know what you think!