Author's Note: It's a little late and I'm playing catch-up, but I wanted to post my fanfics for Tumblr's Elsanna Week 2017. Each chapter will be one of the different prompts.
Anna awoke coughing in a room filled with smoke. Her bed was on fire. She was still lying in the bed, surrounded by the flames. In a panic, she leapt out of the bed, rolling on the floor in an attempt to put her nightgown out. When she was convinced the fire was doused, she tried to pull herself to her feet using her nightstand, only for it to immediately combust as well. "Elsa! Kai! Gerda! Anyone!" She called out, desperate for anyone who could save her from being consumed by the flames.
The door to her room flew open and she was greeted by more coughing from two shapes concealed behind the black smoke. "Your highness?" She heard Kai ask, his voice filled with panic.
"Anna, what happened? Where are you?" her sister shouted, charging through the smoke with a shawl of ice wrapped around her head.
"I'm here!" Anna called back, running towards her sister's slowly materializing form.
Elsa grabbed her sister's hand to lead her away from the flame, but immediately recoiled at the touch. She stared at her hand, the first layer of skin had been singed off and the next layer was blistered and red. "Anna?" she asked in a trembling tone.
"What is it? Let's get out of here!" Anna insisted, grabbing hold of the queen and dragging her out of the room. When they were in the hallway, Elsa struggled free of her grip and held her wrist, soothing the new burn. Anna stared at her in confusion. "Elsa, what's wrong? My room is still on fire! Can you make ice to put it out?"
Elsa wasn't listening, the burn on her wrist was bad. She looked between it and her sister, realization dawning on her. "Stay back," she whispered.
"What are you talking about?" Anna took a step towards her sister, who immediately shrunk away. "Elsa, please, my room!"
Elsa waved her other hand in the direction of the princess's chambers, causing a giant wave of ice to crash against the fire, covering everything in steaming water. She then took a deep breath and straightened herself, hating the look of hurt and confusion on Anna's face and knowing that she caused it. "Touch that curtain," Elsa said hesitantly, terrified to confirm what she already knew.
Anna looked bewildered, but did as she was told, reaching out and grabbing the curtain on the nearest window. It immediately burst into flames. "Elsa?" Anna asked.
Elsa made another wave with her good hand, the ice melting and extinguishing the flames before it could grow any larger. "It looks like I'm not the only one with powers anymore," she said bitterly. "I'm sorry you have to go through this too."
"What are you-" Anna asked, gesticulating with her arms and causing a nearby plant and suit of armor to both catch fire, the armor beginning to melt. "Oh."
Elsa extinguished both of the new fires and looked down sadly at her sister, again clutching her wrist, now wrapped in an icy bandage. "I can help you learn to control it. It's not the end of the world. We'll get through this," she explained, trying to calm her sister down before she lit any more of the castle on fire.
"But now I can't touch you," Anna pouted, tears steaming in her eyes.
Elsa shivered, Kai was still nearby, this was not the appropriate place for such a conversation. "Kai, would you be so kind as to replace Anna's furniture and bedding? I'll take care of her."
"But your arm, your majesty," he said, staring at the queen, not quite willing to leave. "We need to take you to a doctor."
"I will after I make sure that Anna will be all right," Elsa proclaimed, calmly. "I promise, now please go make sure that my sister still has a bedroom."
"As you wish," he assented, heading for the stairs to procure new furnishings for the room.
Once he was out of earshot, Elsa reprimanded Anna, "You know you can't say things like that around the servants! Word travels."
"It's Kai, we can trust him! And besides, what's it matter now? I can't even touch you without burning you anymore, there's nothing for anyone to find out about!" Anna shouted, the drapes near her beginning to smolder again.
"It'll be okay, you can learn to control it. I can touch you without freezing you, it'll be the same for you," Elsa insisted, slowly taking a step towards her sister.
"It took you thirteen years to be even close to controlling it, and I still almost got frost bite on my tongue that one time! I'm not willing to light you on fire! There's no way I can avoid hurting you, I have to leave," Anna cried, the drapes reigniting.
Elsa waved her hand, put out the fire, and coated her palm in ice as she continued to approach her sister. "You're not copying me, you don't get to run away and make a castle out of fire, evaporate the fjord, and burn down the city, you're better than that. I'm here for you, and we'll figure this out," she placed her hand on her sister's face. Anna leaned against it, relieve at the touch, as the ice coating melted and steamed. "We will make it through this."
"I believe you," Anna sighed, reluctantly pulling away from her sister's hand before she could burn her again. "But I'm still not taking any risks. Let's go down to the dungeon, there's nothing I can burn there."
"Anna, you melted a suit of armor, I'm not sure there's anything you can't burn."
Anna stared at her sister in shock. "I did what?"
Elsa pointed at the still molten edges of the nearby armor. "We have to figure out how to help you control your power, you can't just run away."
"And how am I supposed to do that? I don't have your self control, I don't have anything. I don't know what I'm doing."
"You think I do? That's all stuff that was quite thoroughly beaten into me. You can learn to control yourself too and without any of the unhealthy lessons our parents drilled into my head."
"How am I supposed to learn that? I've never learned self control and I've had plenty of time."
"We can talk to the trolls, and you don't get any sex until you can not melt my organs, that ought to motivate you pretty well."