Eat the knight

You leap forwards off the wall, deciding to deal with the knight quickly. She raises her shield to block your first claw swing, and her sword jabs into your scales, managing to pierce enough to sting.

Ow! That must be a magic sword.

Still magic or not, your scales blocked the worst of the hit, and it was only in your foreleg. You twisted that leg, yanking the sword out of the knight's grip and causing her to stumble. While she was off balance, you grabbed her shield and tossed it aside as well.

You took a moment to focus some magic into your stomach in preparation for live prey. The knight regained her footing, then took a single step back before steeling herself. "I'll not abandon my duty, even faced with certain ****. If I have to fight with my bare-"

You interrupted her by lunging down and swallowing her whole.

She yelped while in your mouth, then started squirming and struggling as your tongue pushed her back into your throat. She tried to pound on the inside of your throat with her fists as she slid down, but she didn't have enough room to hit very hard. You could hear her muffled yelling at you, but it sounded like it was just a string of profanity.

Finally, she fell into your stomach. Your magic kept her from being consumed by the stomach juices, so she would just sit there until you threw her up or pushed her out the other way. You could feel the trickle of magic being drained from her, but she had even less than the average human.

The knight dealt with, you turned your attention back to the keep. You tore the doors of the keep off their hinges, then peered inside. A few cowering guards were backed against the far wall, but none of them looked like a princess. You ignored the guards and started climbing the outside of the keep, peaking into each window until you spotted a room with a young woman wearing an ornate dress and a silver crown. Two guards were in the room, but their attention was on the door.

The woman, who you assumed was the princess, turned to look at why the light coming in the window was blocked, then screamed when she saw you. You plunged a claw through the window and used it to tear out a section of wall large enough that you could reach into the room.

The princess started backing away, but you quickly reached in and grabbed her in your claw. The pair of guards tried to attack you, but their spears broke against your scales. Then you launched off the castle to fly away, your prize in claw, and an extra bonus still yelling at you from your stomach.