This next one isn't very fluffy, but I like it anyway because it shows some reaction to the movie's incidents. I hope it's acceptable.
The rain became a violent storm later that very same night, holing the Goldsteins and Newt up in the apartment. Clouds blocked out the sun all day, wind lashed against the windows, rain leaked through every tiny crack in the walls. The whole city was shrouded in uncomfortable semi-darkness for days. Everyone was bored and freezing and eagerly awaiting the rainstorm's end.
And then, all of a sudden, a terrible change started to take over Tina. She was always awake and waiting when Newt or Queenie got up in the morning, no matter how early it was; she seemed to permanently have black shadows beneath her eyes; she lost her appetite and could stare at one spot for hours on end.
Newt and Queenie, worried, tried to question Tina about her condition. They expected her to snap angrily when they spoke, but instead she did something much scarier: she started crying and shut herself in her room.
Now they were terrified. What sort of dreadful thing could cause their sweet, determined little Teenie to burst into tears at random and develop insomnia? Both of them feared the worst.
Tina rebuked any attempt to help her. She shrugged off comforting hands, turned away from soft-spoken words, shoved away food usually made for illness. She spoke less and less. It seemed though the old Tina had shriveled away into herself, leaving a miserable husk that needed help but couldn't receive it.
Newt and Queenie let Tina's actions go by for a few days, hoping she'd return to her normal, happy self. But that didn't happen, and they remained scared and confused and feeling useless.
Then, one night, Newt lay awake until quite late. He always took a long time falling asleep, and this night he was quite thankful for that. Otherwise he wouldn't have heard Tina scream.
It was a short yet piercing shriek, instantly rousing Newt from his half-slumber. He was on his feet before he knew it, wand in hand, rushing to Tina's room, throwing open the door-
She wasn't being attacked. She was alone, thrashing about in her bed, terrified. Newt dropped to his knees by the side of her bed, throwing his arms around her body to calm her flailing limbs.
Tina twitched at his touch, then gradually stopped wriggling around. Her eyes, wide with fear, took a few seconds to compute that it was Newt before her and not any unseen enemy.
"Tina," he said, trying to calm her down. "Tina, what happened? Are you okay?"
Tina took a shaky breath, trembling all over. Newt put his arms around her to show protection, feeling her heart hammering violently in her chest.
Tina squirmed away from Newt, clasping her arms around herself. "Nothing. Nothing happened, Newt. I'm fine. I'm fine."
"No." he stayed in his spot refusing to move away. "Something just went on. What happened to you?"
Tina shut her eyes, running her hands through her hair.
"Just a nightmare. Nothing serious. I'm just being weak." She attempted nonchalance, though her voice was high and wobbly with fear.
Newt frowned. "Tina, I have nightmares sometimes as well. They never have me waking up screaming."
Tina opened her eyes again and gave him a pained and crooked fake smile. "See? Just me being silly. Now please get out of my room."
"Tina-"
She shoved him right out the door, surprisingly strong for a person who'd just suffered a horrible nightmare.
"Goodnight, Newt." She said.
He just noticed a tear sliding down her red cheeks when she slammed the door in his face and locked it.
The following night Newt awoke again to the sound of Tina's cries. He ran to her room, ready to comfort her and calm her down, but the door was locked. Newt couldn't just Alohamora his way inside; she'd never forgive him. So he just begged her to let him in until she went silent. Then he went back to his own room.
The next time Tina screamed in the night and Newt ran to her room, he found Queenie kneeling outside the door with tears streaming down her face.
"We need to help her." She whispered, heaving a dry sob as Tina shrieked from inside. "We have to get her through this."
Newt crouched beside her, putting a friendly arm around her shoulders in an awkward manner. "Do you know what could help?"
Queenie sniffled. "I once told you that people are easiest to read when they're hurting. Well, I can't sleep sometimes because her nightmares are hurting her so much…"
She succumbed to tears again. "Oh, Teenie..!"
Newt's stomach clenched and he felt like crying himself as he thought about Tina, hurting and suffering all alone, too ashamed to ask for help.
"Listen." Queenie said suddenly, wiping her eyes. "She's gone quiet. She's asleep again."
Newt breathed a sigh of relief. "Oh, thank Merlin."
"Newt, I just thought- what if we used Alohamora on the door while she's still asleep? Before the nightmares come? That way we can wait beside her to help if she's scared."
Newt blinked. "That's a brilliant idea, Queenie."
She smiled a small smile. "Perhaps you should be the one to protect her, Newt. She won't want me there at that moment, I might accidentally read her mind."
He nodded firmly, then quietly unlocked Tina's door and crept inside. Queenie shut it behind him.
Tina was spread-eagled on her bed, covers tangled around her. Despite the sweat on her face and her flushed red cheeks, she seemed almost peaceful. Newt willed her to stay that way, to sleep calmly until the morning.
No such luck. It was only around ten minutes later when she gave a little gasp, making Newt jump.
Tina started sobbing all of a sudden, yelling, repeating one word: NO. Her whole body started flailing like a fish out of water as tears streamed down her cheeks. Newt heard Queenie sniffle loudly from the other side of the door, heaving. Tina must be having a terrible nightmare for Queenie to be feeling so much pain from her.
Newt threw himself across Tina's body, preventing her from rolling off the bed. She was still thrashing though, crying as she repeated her words: "No! Please, no! NO, STOP!"
"Tina!" Newt said loudly, over and over again. Only her name, as if it were a magic spell that could save her from her own mind.
Slowly, torturously, Tina calmed down. A few minutes later she was no longer screaming, so he allowed himself to sit up and look her in the eyes.
Tina was a mess, sobbing like a baby, trembling like a leaf in the wind.
"Oh, Newt." She cried, bunching the blanket up in her fists. "Oh, Newt!"
He reached for her hand and held it. She didn't pull away; rather she clung on tight and attempted to control her ragged, panicked breathing.
"Alright, Tina, those were no regular nightmares." Newt said firmly. "What exactly were you dreaming about?"
Tina shakily sat up and buried her head in her hands.
"A lot of things." She whispered in a scared voice. "Sometimes I see that time I went for Mary-Lou Barebone in front of her followers, but instead of just sitting there they all whip out wands and attack me as well. That's one of the lesser ones. Sometimes I see that time Grindlewald was tor-" she swallowed. "-turing you, and I'm standing there and I can't move and I can't look away… or when the MACUSA killed Credence-" she sniffed, wiping away tears, "-But I'M Credence and he's standing there and saying that I didn't save him so why should he save me? But the worst one is when I'm reliving the execution, and instead of being taken there I'M the one leading you and Queenie and I put her in the chair like a little puppet and as she starts getting lowered to her death, screaming, I turn to you and get ready to execute you as well and I just watch as her head sinks beneath that liquid and she stops screaming and-"
Tina broke down crying again, shuddering violently. Newt sat down next to her and put his arms around her, hugging her tight.
"Tina Goldstein," he said, "Those are not just nightmares. Those are the most dreadful nightmares I've ever heard of and don't you dare refuse help after this."
Tina shivered. "I'm twenty-six, Newt. This is ridiculous."
"Not at all, I've heard ghost stories less scary than those nightmares."
She didn't complain or argue, just leaned her head against Newt's chest and tried to calm herself down. Newt stayed there until he felt her breathing become even again and he knew she'd fallen asleep again. In fact, he remained also after that, protecting the sleeping Tina from nightmares up until the sun had already rose.
Then he gently lay her down in bed, left the room, escorted a half-asleep Queenie back to her own bed, and finally went to sleep.