The freedom flower (yandere!error sans)

Melted

Roses pov
It's been about a month since Undyne and I had last hung out, she would bring me to her lab and we would sit around and talk about random stuff while the others went and did their thing. Sans would train with Alphys t'ill he was 'strong enough to return home' , and Papyrus and Vanessa have been getting along well. I feel kind of bad, Vanessa hasn't been hanging out with me as much as she usually did, spending more time with Papyrus instead. And she started having to ask me what I was saying, instead of catching on like she used to, she even stopped calling me Rosie. The one thing we could have to ourselves in the asylum were the nicknames we had.
Not wanting to be a bother to the others me and Undyne would sneak to her lab for 'research' on me, when in reality we would just do something called binge eating and watch tv.
Last time we watched this weird show in the tv calle anime, it was strange but I pretended to like it so Undyne would be happy, she seemed to know everything about it and had a hard time not spoiling it.
Today I was waiting for Undyne to come over to take me to hotland, but the phone rang instead.
"Who is talking in the other end?" I asked, I heard a loud groaning sound from the other end of the line "h-hello Rose-*cough*" Undyne spoke in a weak voice, I raised a brow and clutched the phone tighter "you sound like carcass." I said in worry, Undyne tried to laugh from the other end but ended up having a coughing fit instead.
"S-s-sorry I c-can't *cough* p-pick you up....*cough cough*" she mumbled weakly, I starred at the door and frowned "why don't I take my body and bring it to fire town?" I asked, she coughed a little quieter at this and the line went silent "y-y-yeah *cough*.....t-that would be gr-great-*cough*" she said, I didn't bother hang up. Papyrus and Vanessa should be getting home soon so they would take care of it.
I opened the door and started running towards hotland, wasn't the best idea due to the distance and slippery path through waterfall, but I was getting there faster.

?????'s pov
I injected Undyne with determination, it makes monsters sick after a while,
before it melts there bodies to nothing from the inside. I watched Undyne hobble around and clenched my fists as she waited for Rose to arrive, I let out a chuckle that rang through the lab "w-wha-*cough*" Undyne stuttered, before going into a coughing fit.
I laughed louder and watched Undyne spin around the room weakly as she tried to find where my insane laughter was coming from, stupid bitch. I wrapped strings around her soul and lifted her off the ground, she had a screaming coughing fit and shook with fear, sweat and spit flying everywhere as she tried her best to scream.
I stepped out of my hiding place and stared up at her chuckling, she looked at me with a terrified face "S-S-Sans? *cough*" she said in a frantic and small tone, I smirked and tightened the strings on her soul. "N-n-nope! sor-r-r f-I-I-sh breath-h" I said, she winced in pain as I tightened them and my smirk grew wider, I adored watching this glitch suffer. "W-w-why are you doing t-this t-to me..." She said, as the coughs started  to fade, almost time.
"I-I-I'm doi-i-ing what I h-h-have to-o for M-M-MY lit-t-tle Rosie-e"I said, as I swung her body bak and forth in the air, cackling as I watched her face form into a confused and shocked stare. Small blue drops fell to the floor from her fingers as they started to melt, she noticed this as I stopped swinging her before she panicked "w-what have you done." She said frantically as she looked at her slowly melting arms, I let out a chuckle and I watched her lab coat start to drip to the floor "o-oh.....I-I-I-I jus-s-t gave you-u-u so-o-ome deter-r-rminatio-o-on." I said, before Undyne's a eyes grew wider than they already were.
She started wailing for help as her pathetic arms melted into a puddle on the floor, it moved to her body. I was about to start swinging her again to speed the process, but before I could Rose burst through the doors and her footsteps echoes through the lab as she got closer to where we were. I sighed happily before going back into the shadows "a-a-and remember-r-r....." I said, Undyne's a weak voice croaked out for Rose in a small whisper. I slowly lowered her to the ground as her struggling slowed to a probably extremely painful stop "s-s-stay d-etermined." I said, before a sweaty but gorgeous Rose stumbled into the room.

Roses pov
I stared at the floor in dismay at Undynes melting body, gasping for breath I weakly stumbled over to her. She stared  up at me in fear as her eyes soon started to dribble down her gooey cheeks "h-h-help mph-m-meee..."She chocked in a sad and desperate whisper, before her body turned into a puddle on the floor,
The whole mess a porridge like blue substance. I felt tears in my eyes and I stared down at the puddle in horror, I didn't help. I couldn't do anything, Asgore darted back into my mind as panic filled my body and I thought about what to do, I was about to freak out.
But a name popped into my head, Vanessa! I made a sprinting dash out of the lab and Into the hot atmosphere, my sides burned as sweat fell into my dry mouth. Soon the heat faded and was replaced with a damp and murky chill "almost there." I thought in my head as I raced on, my sides burned like fire and my lungs felt like they were gonna collapse, but Undyne's melted body stayed fresh in my mind as I remembered her eyes dropping from her head like pudding from a cup.
I burst through the door to see everyone inside having some tacos "ah, Rose! How's it going?"Vanessa asked, Sans jumped up to me happily "ROSE! IVE BEEN WAITING FOR YO-" Sans said, before he caught a glimpse of my terrified face and sweat drenched face "what's wrong." He asked sternly and led me into the kitchen to sit down, Alphys followed immediately. I expected Vanessa to come sit by my side like she always does, but I looked back to see she was talking with Papyrus, and she didn't even know we all left the room. After I calmed down Sans handed me a glass of hot tea and began dabbing the sweat and tears off me with a soft towel. "Tell me what happened." He said in a sincere voice, but still with hints of seriousness. Alphys sat on the table with her arms crossed "where's Undyne?" She asked, I sent her as scared glare before speaking "Undyne joined them." I said, Sans' eyes grew wide and Alphys sent me and odd and nervous glare "what do you mean? W-what does she mean sans!?" Alphys stuttered, Sans looked up at her nervously "she said t-that Undyne, I-is dead." He said, everything grew silent for a second before I felt a hard slap to the face.
I fell to the ground with a thud, alerting the attention of Papyrus and Vanessa. Alphys towered over me angrily and kicked me repeatedly "YOU DID THIS!!!!" She yelled as she kicked me in the face, I screamed in Pain as she grabbed the collar of my dress and lifted me off the ground "A-ALPHYS STOP!" Sans pleaded, Vanessa and Papyrus walked in and gasped "Rose! When did you get home?" She asked, before Papyrus wrapped and arm around her shoulder and stared at me with a sneer.
I was about to plead for help but Alphys punched me in the stomach, making Vanessa scream in shock and Sans gasp. I hit the ground and was repeatedly kicked again, my consciousness started to fade as I saw Alphys' boot above my head, ready to crush my skull. It was just like what the nurses did, I winced as I saw blood trickling down my nose, I was ready to accept death.
But I felt two arms wrap around me and pull me off the ground, my eyes started to shut as whoever it was dashed into the snow and out of the house. Vanessa's screaming filled my ears as blood from my nose got all over my carriers clothes and face due to the bouncing I did in their arms, they were running quite fast. I looked up weakly before my eyes shut completely, but the last thing I saw was a blue bandana right above my eyes.

Papyrus's pov
Sans ran off with the stupid kid, Vanessa started screaming for her as I called out for Sans. After a while their figures disappeared into the white, Vanessa kept calling though, so I worryingly put and arm around her and guided her back to the couch to comfort her, leaving Alphys to beat up the table in rage until she calmed herself down.

?????'s pov
I'm gonna murder her, I'm gonna rip her eyes out and make her eat them. I starred at Alphys through the shadows with rage, she huffed angrily at herself and paced around. How DARE she hurt my Rose! Now my precious little flowers wilted and with the wrong Sans as her protector. It's all her fault!!