If you wondered what happened to Poppy on Outcast Island, here it is. This happens during the episodes We are Family, part 1 and 2.

"Amazingly realistic! Wouldn't you say Poppay?" Alvin sneered down at the pinned girl. He enjoyed seeing Stoick's little flower desperately trying to free herself to no avail. Despite her arm pinned behind her, she kept thrashing to get away.

"What do you want?" She finally stopped struggling.

"I want me own dragon trainer. And by the looks of it, I've got 'er" Alvin answered a pleased smile spreading across his face.

"I am not going to train your dragons Alvin." Poppy responded firmly as the outcast pinned down on her harder.

"Oh I think you will. And once you have, I'll use them to destroy Berk. Take her!" Alvin demanded. Poppy grunted in pain as the outcast forced her onto her feet. "I don't understand," Poppy stuttered. "How did you do this?!" Before the soldiers grabbed her wrists and forced them behind her back. Poppy continued to struggle to free herself when one of them grabbed her hair and yanked her head back painfully. Poppy cried out in pain as he held her head there until they finished tying her wrists tightly. Toothless roared furiously when he saw her face contort with pain. "Don't touch Toothless!" Poppy screamed as they began to restrain her dragon to one of those horrible carts. It always hurt her to see her best friend stripped of freedom. This resulted in a slap across her cheek so hard she would have fallen to the ground if the outcasts were not holding onto her arms. Poppy winced as she felt her cheek began to sting but kept kicking to get out of her captors grip as they started to force her towards their ship with Toothless already on it. Reaching the plank, Poppy planted her prosthetic into the wood to resist as much as possible but Savage forced her up the ramp and kicked her off at the top and onto the boat next to her restrained dragon. Against her dragon, Poppy tried to catch her breath from her constant struggle until she saw somebody else familiar come up the ramp.

"Mildew" She breathed. "What are you doing here?" She questioned softly, too shocked to speak any louder.

"Aw look at ya, the brightest girl on the island and yet here you are, trapped by a silly old man and his sheep" He taunted looking down at her.

"How could you do this?" Poppy demanded, fury growing inside her. Mildew smirked. "YOU did it Poppy, YOU followed our Bork notes, YOU followed the map we drew you, YOU waking right into our trap! All for the love of a dragon. Hmm, maybe you'll think twice next time about where you place your loyalties." Poppy gave him a hateful glare in return for his guilt trip. Alvin laughed at the sight as he pushed Mildew aside.

"There won't be a next time. Raise the sails! We're headed home! To Outcast Island." He added the last part slowly to make sure Poppy knew there was no way to escape this time. Satisfaction came to him when he saw the fear in her precious green eyes despite her desperately trying to hide it.

...

Alvin's hand stuck Poppy across her face, knocking her to the floor. Alvin pressed his boot into Poppy's diaphragm, causing her to lose the air in her lungs. Poppy clawed at his boot trying to push it off of her so she could breathe again.

"What did you say to me?" Alvin darkly questioned as he stared down at the girl beneath his foot.

"You heard me." Poppy wheezed out. Gathering as much air as she could she answered more forcefully? "I said I won't train your dragons! You can't make me!" as she gasped for more air. Alvin was growing impatient with the Stoick's brat refusal to cooperate. She was stubborn, just like her father that was always one way to tell they were father and daughter. With one final push, Alvin finally released her from his foot, she rolled over trying to regain her breathe. This gave Alvin an opportunity to grab her by her vest, lift her up and began to shake her violently.

"I'll teach you not to refuse me!" He yelled at her when he finally ceased jerking her back and forth. Snarling like an angry animal Poppy spit in his face. Infuriated, Alvin threw her back onto the ground with force hoping to hurt her ribs. Poppy's head banged against the floor and the impact blurred her vision and other senses. Too stunned to make sense of her surroundings, she felt herself being forced to flip over onto her stomach. She barely felt her vest being torn off of her. Only when she felt the sharp sting collide with her back did her senses snap back to reality. Alvin was using a whip to disperse his anger at her. Each whipping felt harder than the last. Poppy gritted her teeth and dug her fingernails into the dirt floor as she withheld her screams, determined to not give Alvin the satisfaction of hearing her pained scream. After what felt like hours of torture, the whip left and didn't come back. Alvin wiped the whip clean of her blood and shook it onto the floor into Poppy's line of sight as she lay on the floor. He then left her to endure the punishment for her defiance. Poppy's fought against her eyelids as they tried to close, the last thing she heard was her cell door being slammed shut and locked before her eyes finally shut.

…

To Poppy's relief, Alvin left her alone the next day, or night. She wasn't sure. She had no way of telling what time of day it was, she didn't even know how long she had been on Outcast Island. Poppy pulled her tunic tighter around herself to put pressure on her wounds. They had stopped bleeding for the most part, but she wasn't sure how long she could hold out without treatment before infection set in. She thought about Toothless, praying he was okay, wanting to run, find him and fly away from here. But she was powerless to do anything, the only thing she could do was hope her nightmare would end soon.

…

It was practically quiet at the time, maybe it was at night? Poppy was laying down with her eyes shut. There was no way she was going to sleep and leave herself vulnerable, she was trying to rest by closing her eyes and lying in a fetal position. She was almost asleep when she heard someone open her cell. Her eyes snapped open and saw that it was one of Alvin's lowly henchmen, the one that had pulled her hair, slowly closing the door shut behind him. Poppy was already so terrified that she couldn't hide her fear no matter how hard she tried. She didn't know why he was here, but she knew it wasn't good. He continued to walk towards her not saying anything and this frightened her even more. She stumbled back against the rock wall trying to get away, but she had no options. She tried to dart past him, her wounded back and weakened body screaming at her to stop, but her grabbed her hair again and threw her back against the wall. Poppy tried to cry out in pain as her wounded back collided with the rock but the henchman put his hand over her mouth blocking her speech. He grabbed her wrists and pinned them above her, rendering her helpless. He yanked her forward and forced her down onto the floor, once again agitating her injured back. She tried to scream in pain again but then a cloth was shoved in her mouth and another one was forced around it, gagging her. Her hands were still pinned above her head in a painful hold as the outcast stared down at her. With him on top of her, with her hands pinned down and gagged, she had no way out. The outcast then used his free hand to tear off the threads at the neck of her tunic. Poppy screamed in fear but her cries were muffled by the gag. He then ripped open her tunic down the middle and began to run his hand up and down and across her torso and chest as she screamed into her gag in protest. Poppy thrashed her head back and forth trying to free herself, but to no avail. Then he began to try and tear her leggings off, which caused him to lean back for a mere second but that second caused Poppy to bring her left leg out from under him and kick him in the groin. The henchman rolled over in pain and Poppy scrambled off the ground and ran for her cell door. The henchman wasn't smart enough to lock it behind him and she threw open the door and ran down the passageway, not caring where she was going as long as she was getting away. She tried to tear the gag off of her, but it was tied too tightly. She could hear the henchman yelling about her escape and that frightened her further. Two pathways came and she didn't even stop to consider which one to take and kept running. Running so hard she couldn't tell what she was seeing and she crashed straight into Alvin and bounced onto the ground. Alvin wasted no time yanking her up and tying her arms behind her back.

"How did she escape?!" Alvin yelled, furious that he almost lost his prisoner he had spent months trying to capture. Poppy's eyes widened in fear when the henchman finally caught up, bending over from a lack of breath. Alvin saw Poppy's fear and knew he had been the one to let Poppy escape.

"YOU let her escape?! I didn't give you permission to deal with the prisoners! I've spent too long trying to catch Stoick's brat! I won't have her escaping' because of you!" Alvin yelled in fury. He tossed Poppy onto the floor as he drew his sword out and raised it above is head. Poppy tried to crawl away but could only go so far with her hands tied. The henchman tumbled on his own feet as Alvin approached him. Alvin swung the sword in a well-practiced manner and brought it down across the henchman's neck, decapitating him right in front of Poppy's once innocent eyes. His body dropped like a rag doll and blood spewed from his neck in all directions, spraying onto Alvin and onto Poppy as well.

"Pull another stunt like that last one and you'll be next." Alvin's threat didn't even seem to process in Poppy's mind. Watching the bloody scene unfold, something felt like it was slashed across Poppy's mind. She didn't even seem to notice the sword threatening her own throat. Furious at her lack of reaction, Alvin once again slapped her across her beaten face. Her cheeks no longer possessed a natural pale tone but now a grey color from the constant bruising. She was so tired of being hit, but she didn't care anymore. Her whole body felt cold, numb. Almost like she was shutting down, overcome with fear. Alvin threw her over his shoulder as if she weighed nothing and took her back to her cell. Throwing her back inside, he removed her prosthetic rendering her helpless to go anywhere. Poppy felt herself become an invalid but felt drowned in horror to move. She wanted to wrap her arms around her legs but could only pull against the ropes restraining her hands. With no way to comfort her traumatized self, she brought her knees close to her chest as she trembled in terror. Leaving her tied and gagged, Alvin slammed the cell door behind him and double locked it this time. No chances of another escape, but she didn't want to go back out there, she wanted to hide. Hide in a safe place, like the cove. Yes, she always felt safe in the cove with Toothless. Before she slipped into unconsciousness, she thought of being in the cove, with her friends and family, safe and sound. A safe feeling she would probably never feel again.

Ok there you have it. The abuse, whipping, attempted rape contributed to her trauma, but seeing someone being decapitated right before her eyes is what lead her mind to snap, leaving her trapped in a terrified state.
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