Not the brightest idea Sans had, thought Frisk as she shook once more at his haunting words. Frisk had managed to make it outside without trouble, she managed to shut off the power grid to the puzzles meant to trap her. Past Toriel's door as well, now she was out and can do whatever she wanted… which she could have do any time she wanted.
Although, now to think about it, this could have been avoided if she had simply told Toriel she was going exploring. To contrast, it wouldn't be as fun as it was now. Because this was disastrously fun for Frisk, however worrying it is for the others. Frisk could survive here on her own, if she pleased, she didn't really have to stay with Toriel.
Frisk hummed as she leisurely walked, any note she wanted, however she wanted it. A funky tempo with horrible timing, but Frisk is a little kid whose musical experience is blowing the music teacher's brains out of her head with her recorder skills. Or lack thereof, Frisk hated the recorder and the recorder hated Frisk
The first thing Frisk saw was a flash of light followed by crying, the crying sounded like a small child – maybe no older than Frisk herself. It was terribly loud, louder than anything Frisk was ever expecting from the Underworld. It shook the pebbles on the ground and nearly shot Frisk back, determination was the key, she was morbidly curious so she went to investigate.
A figure was slouched over, clutching her right arm. Screaming, howling, bawling in what appeared to be pain. Normally, Frisk would have simply moved on but further investigation will quell the sounding drums of curiosity. Frisk inched nearer, unsure if she felt like she needed to slip on her Heart Necklace.
The Heart Necklace was a silver necklace with a moodstone heart attached to it, moodstone was a material unfamiliar with Frisk but it matches the color of her feelings. Like a mood ring, it changes color depending on how strong an enemy is—some monsters have the power to change the color of her heart to limit her movement.
As she got closer, she took her moodstone necklace out of her pants pocket and clutched it tightly. The heart glowed red at her touch, it filled Frisk with determination to quell her curiosity. The figure grew clearer as she took the steps towards the bellowing child, the child wore a raincoat with a few patches on them. The child's face was scrunched up, tears flew from his face freely along with his sandy blonde hair.
The child's right arm was made of ice, to replace a missing arm.
"Oh my god…" whispered Frisk, her heart leaped in her chest. The moodstone heart clenched tightly in her hand pulse rapidly to meet the heartrate of the operator. Frisk peered down at her Heart Necklace, noticing it was slowly turning grey the more she listened to his screaming. "My heart…"
The child stood up, her face molded from her pained look to match a furiously, animalistic, ballistic, and heart dropping fired up look. A thick and quick smog made of gas nitrogen that froze the dust and rocks around Frisk was exiled through his mouth and nostrils, Frisk held the Heart Necklace away from the smog.
"The cold, the fear, the pain, the sorrow!" chanted the child, her ice arm developing spikes in random patterns. The child's ice fingertips grew icicle claws, a sinister grin spread across the child's face as she opens her eyes to expose golden eyes with electric blue smoke radiating off of his golden iris. "Make it stop, Ani promised! Your soul shall kill my pain!"
Frisk slipped the Heart Necklace over her head and around her neck, she clenched her fists tightly. The child spread her legs shoulder length, she let her monstrous arm drape down to show Frisk her ice knuckles. Frisk stumbled back but caught herself, reading herself with a nearby stick that happened to be at her feet.
"We don't have to do this!" tried Frisk, holding the stick harder and harder until her knuckles burned white. Frisk wanted nothing to do with this new monster, or anything to do with the icicles on that monster's ice arm.
"Take my pain away—!" The child lunged forward with incredible speed, faster than Frisk had ever seen in her entire life—and she saw how effective Sans' ghastblasters where at obliterating monsters with his special quick draw. Frisk's eyes blurred up and filled with stars, a muffled pulse went throughout the back of her head. Her jaw felt numb as she lost her balance and skid-rolled across the ground on her side, blood running down her bruising cheek. "Chara! Take my pain away!"
Whose Chara?
Frisk waited until the smog disappeared before inhaling sharply, her lungs cracked as she breathed. The taste of copper and metal combined with the bitter taste of nitrogen, she weakly pushed herself to her knees and elbows to let the blood drip from her teeth. Frisk looked down at her Heart to find it cracked down the middle, which meant she was drained completely except for one life point.
"We…. Don't… have to fight…" pleaded Frisk, wiping blood from her lips. Frisk ended up breathing the smog, she coughed violently. "Please… I'm not Chara… whoever that is…"
"Frisk…?" The child inched closer, before leaping away. The child raised her frozen arm and the icicle claws shot in rapid bursts, leaving no time for error. Frisk leaped up and rolled out of the way, finding her strength to be not stamina but adrenaline. Frisk picked back up her stick with a weaker grip. "You lie!"
"We don't… have to… fight…" Frisk wasn't a killer, she couldn't do it. Killing was a big rule for her, she would only kill if absolutely necessary—and Frisk didn't throw that term loosely; the idea of killing, monster or man, made her head spin and become dizzy. She's only had to kill one monster, it's still haunting her.
Frisk hadn't slept for days.
The child rushed forward again, claws extended.
Frisk could do nothing except watch, the stick falling to the ground uselessly.
The child neared, smog trail following her.
"Waugh!" screamed Frisk. Frisk quickly raised her arms to cover her face, bracing for impact. But instead of death—erupted was a tornado of fire, swirling around her defensively. Frisk had no idea what she was doing, it just came naturally. Frisk jumped, flailing her arms in a clockwise circle at the heat of the flame tornado and a thick smokescreen covered Frisk and The Child.
The Child shot from the smokescreen and attempted to lash at Frisk, Frisk leaped backwards and extended her arms to unleash the roar of fire extending from her palms—shoving The Child backwards to escape the intense heat of the fire. Frisk dropped her arms to her side in a stunned manner, shock overtaking her.
Fire circled Frisk, engulfing the little kid in the invisible but white-hot heat that the blue flames emitted. Frisk breathed heavily, frantically, scared of what she just done—humans can't do this, they can't dispel fire at the flick of their palms… what just happened?!
"Stop this, I have bested you!" screamed Frisk, the flames around her growing hotter with every syllable she lets past her lips. The Child groaned painfully, clutching his monstrous arm. The flames made The Child sweat, especially around the ice arm. "I am not who you think I am!"
"Liar!" screeched The Child, Frisk clenched her fist and the flames grew taller and thicker than Nebuchadnezzar's walls. The Child reeled back at the immense heat, her heart appeared in front of her chest and begun to turn into red splinters.
"I'm not lying!" rebutted Frisk with her circle of fire beginning to lower down as she released her clenched knuckles, her wounds healed and sewn back up as the fires licked and danced at her presence. "I'm not continuing this stupid fight, I'm going home!"
"Your eyes! They glow redder than blood!" cried The Child as she charged faster than Frisk could react and smacked Frisk upwards with ease, sending Frisk and bloody mist into the air.
Then, fire exploded everywhere within Frisk's sight. The fire around Frisk lit up again as her Heart dangerously neared death. Frisk's anger shot up tenfold as the flames coating Frisk forced The Child to reel back, Frisk concocted a fire bomb by throwing fire like a snowball.
"You… haven't… won…" The Child's heart cracked and split into two, then broke apart in a blinding white light in the shape of a halo. Frisk felt the fire that surrounded her dissipate with ease, winds howled in Frisk's ears—pushing Frisk but at the same time, gravity of the halo was pulling Frisk forwards.
Frisk couldn't fight back, all of her energy was sucked right out of her. Frisk flew towards the halo, what followed her was a flame with a hole in the middle—Toriel's magical attack.