Undertale: Brave Heart

by Starlord18

Vincent was 19 when he dropped out of college. He moved to New York City in hopes of a fresh start. However, 3 years later he gets a phone call at night from his mother saying his 14 year old sister Izabella has gone missing. Vincent returns home to California to help, but he soon discovers something he never believed existed and something about himself he never knew.

4. Chapter 4

I just want to say thanks to all you viewers for reading my story it means so much to me. Fair warning to everyone, what your about to read is an idea I have come up with (I'm sure its easy to figure out). Also some of the events in this chapter are based off a video I saw on youtube once and it inspired me so much I thought it would be cool to add it in my story so shout out to the creators of that video. If any of you know the name of that video let me know and I will give you a shout out.

Chapter 4: Waterfall and Fusion

~Vincent's POV~

Papyrus's *FIGHT had put me in a good mood. I have finally reached Waterfall, if Izabella is here then I have alot of searching to do. As I walked I could actually see waterfalls pouring down on my right side and giant ice cubes floating along the river on my left. Probably from Snowdin. Its a good thing that the waterfalls don't cross the path I'm on cause I would be in big trouble and I would rather not go for a swim right now. I look at the ground for a second to see tiny traces of trash on the ground. I shrugged not bothering to question it. I come to a small area with MK looking out in the distance watching other waterfalls, a red monster standing next to a baby blue flower, and Sans sitting in another one of those stations I saw in Snowdin forest. I walk up to the skeleton to say hi and ask him what is he doing in Waterfall, "What? Never seen someone with 2 jobs before?" Sans said "Actually yes. My mother had 2 jobs." "Really sounds like she had a bad time" "She did, but now shes a boss at the job she loves so everything turned out great" "Cool. Anyway I'm going to Grillby's for my break wanna come?" I did feel hungry after that *FIGHT with Pap. "Sure why not" I said shrugging. Sans grins "Well, if you insist...I'll pry myself away from my work" I roll my eyes at Sans as he exited his booth "Over here. I know a shortcut." I rose a brow at him, but followed him regardless. However Sans once again disappeared, "Ok now I'm getting annoyed" I said groaning. Before I could stomp in a different direction I saw a grey door, "Huh that wasn't there before". I went up to the door like something was pulling me towards it. I turn the doorknob to find it unlocked. I open it and it revealed a dark room. I hummed and enter the room, but like in the movies the door slammed behind me. "Wow how cliche", I said.

~Sanses POV~

"Alright here we are" I said appearing in the middle of Grillbys. "Anyway what do you feel like having-" I turn to Vincent only to see him not with me. 'Crap I forgot to bring him', I thought. 'Sans you BONEHEAD he's probably pissed...heh BONEHEAD' I shook my head and used my magic to locate Vincent...weird he seems to be in a dark room with someone...wait a minute. Oh no...

~Vincent's POV~

The room was dark, but it was bright enough for me to see a figure not to far from where I stood. It looked like a skeleton, but it looked disfigured dressed in a robe of some sort. It had two cracks on its skull. One going up its right eye towards its head and the other going down his left eye, "Ah yes" the tone of the skeletons voice sounded male "I've been watching you Vincent" "Who are you and how do you know my name?" I asked "I am WD Gaster and I know quite a bit about you and what your after" I glare slightly "Thats right I know about your quest to find your sister" "Whats your point?" "Your Bravery exceeds most." "Huh?" "It may not strong as Determination, but it wouldn't hurt to have second best" I didn't like what he was implying. I slowly started backing up towards the door. Gaster laughed and used black tentacles to block the door. It shocked me that he could do that, "I'm afraid I can not allow you to do that" I turn back to the disfigured skeleton and I couldn't find the strength to speak "I've been waiting so long for this opportunity" Gaster summoned more black ooze and my orange soul appeared which indicated a *FIGHT. 'Great', I thought. Gaster grinned darkly and ordered the ooze to lunge at me. I did my best to dodge the attacks, but some managed to hit me. Suddenly, a big skull appeared infront of me. The skull looked like it belonged to a dragon or something. The dragon skull opened its mouth and I thought it was gonna eat me, but once again I was wrong. A huge laser came from it and was aimed at me and I saw my life flash before my eyes. To my relief Sans appeared and blocked the attack with a spinning bone, "Sans!" I said happy he came. Sans looked at me then grabbed my arm, "We'll chat later, let's get outta here." he said and snapped his fingers, but nothing happened. Sans seemed shocked at this, "Why can't I teleport? Right?" Sans turns to glare at the other skeleton. While his right eye socket was empty his left eye socket was light blue. Probably not the best time to be amazed. "Your stuck in here with me-" Gaster said then looked at Sans "-especially you...son". 'What?', I thought while looking at Sans, but he didn't look at me. This guy is Sanses father? Sans then looked at the door, "Kid I know you got alot of questions, but can you hold off until then" I sighed, but nodded "Great now stand back!" I did what I was told and Sans summoned a similar dragon skull and blasted the door opened. I took the opportunity to run out of the room with Sans following. I look back to see Sans use a skull shield to block a laser, but it didn't last long and broke. Sans teleported next to me sweating. He must be exhausted. The other skeleton emerged from the huge hole which used to have a door. Sans looked at me "Hey kid I don't wanna alarm you, but I can't really beat this guy" "You gotta be kidding!" I said. The other skeleton chuckled "Ah...So your remember what I'm capable of. There's no way for you to win and you both know it." Sans glared more at the monster, but he looked like he suddenly got an idea. "Hey kid I have a plan" "What is it?" "Lets-" Before Sans could finish a black tentacle pinned him against the wall, "Sans!" I said prepared to help him, but more tentacles grabbed me and my soul dragging towards the other monster, "Vincent" Sans said sounding like he's being choked. "I'll take this if you don't mind" Next thing I knew I was right next to Gaster while Sans was groaning in pain. I realize this could be the end...but I refused. I began to struggle, I was NOT going to die like this. I still have to my sister to find.

~3rd POV~

Gaster sees Vincent struggle and looking at his son Sans seeing him struggle too. To his surprise they both said, "I'm not losing like this!". Suddenly both the skeleton and the human glowed. One light blue and one orange. "What?", Gaster asked to himself. Both lights escaped the tentacles and merged together, "Whats going on?" Gaster asked. The lights shimmered and what was once two people now one person. Gaster saw a human male with brown hair, orange eye color in his right eye and light blue in the left, a blue hoodie with white fur on the rim of the hood, a black t-shirt underneath, black sweatpants with a white strip going down the sides, black gloves, and grey hightop shoes. The new stranger took ahold of his surroundings, "What the..." he said then looked at his gloved hands "...Wait...Vincent...Sans!" the stranger said putting his hands on his head in shock. "Seems like my theory was correct" Gaster said gaining the strangers attention "What are you talking about?" "I had a theory about fusions of souls?" "Fusion?" "Yes and I'm not going to waste my time explaining it to you" Gaster then begun to attack. He fired another laser at the fusion, but the stranger summoned a dragon skull to fire a laser to counter it causing a minor explosion. "How the hell did I...we...whats going on?" the fusion said.

(Inside the strangers mind)

Sans and Vincent stood in a black space, "That was a Gaster Blaster" Sans said "Gaster Blaster?" "Yeah its made up of my magic. I can also use it to lift people up by their soul" "Like telekinesis" "Yup" "So is Gaster really your father?" Sans sighs "I hate to admit it, but yeah. He's my old man." "Why is he like this?" "Me and Paps ran away from home and he wasn't to happy about it" "I'm sorry. Was it that bad?" "Yeah and I would really appreciate it we stopped talking about it." "Sure" "Anyway what about you?" "Huh?" "What about your dad?" "Never met him" "Seriously?" "Yeah my mom said he left a long time ago after I was born" "Sorry to hear that pal" "Its fine I've learned to live with it" "And your sister?" "Well shes not entirely my sister" "What are you saying?" "We are half siblings. Her dad married my mom and she got pregnant, but things didn't work out between them" "Sorry" "Its ok like I said I've learned to live with it. Besides I love my sister" "Heh thats good. Anyway we have to deal with Gaster. Who knows how long we'll stay like this." I nod "Right. I will follow your lead"

(Outside of mind)

"We are ready for you. Or should I say 'I' am ready", the male fusion said. Gaster scoffs and uses his Gaster Blaster to fire a laser on the fusion. Only for the fusion to do the same causing another minor explosion. The fusion then teleported behind Gaster firing another Gaster Blast, but Gaster dodged it by teleporting away. "By the way, its VinSans to you", VinSans said dubbing his name. Gaster growls then starts throwing bones at VinSans, but he teleporting away only for the bones to follow. Once the fusion reappeared he saw the bones coming his way, 'I got this' Vincent said in VinSans's mind. VinSans summons a bone long enough to be a sword and battered the bones. 'Nice job kid. Now watch this' Sans said in VinSans mind. Then VinSans threw 4 bones at Gaster, but Gaster counter them. However the 4th bone managed to scratch Gaster's face, 'Good move', Vincent said. Gaster grew angry and launched more bones at VinSans, but he teleports rapidly to dodge them shocking Gaster. VinSans grins and teleports again shooting another Gaster Blast, but Gaster blocked it. Gaster then trapped VinSans in a bone cage then begun to shrink it. 'Hey Sans I think I know how to get out of this' 'Me too' 'Lets do it'. VinSans summons 2 bones behind him in an X formation and expanded it until the cage broke. Gaster was a bit impressed, "You have to better then that" VinSans said. "I'm impressed you managed to last this long" Gaster said and thought 'But I'm starting to reach my limit'. Gaster growls, "However, I won't give up easily" then uses another Gaster Blaster. VinSans grins "Me either" then Gaster Blaster to counter (another explosion). VinSans then throws 3 bones at Gaster while he did the same. The bones collide and turn to dust. VinSans then teleports above Gaster (like a couple feet to keep his distance) and surrounds Gaster with 8 Gaster Blasters. All of them fire lasers and at the last moment Gaster protected himself, but he recieved some damage. VinSans teleported back on the ground grinning. Gaster chuckles, "I'm really impressed". VinSans said, "Glad to hear that, but one more blast like that and even you won't survive" he summoned another Gaster Blaster infront of Gaster. As it prepared to fire VinSans glowed like last time causing Sans and Vincent to split up. Both of them were confused, "What happened?" Vincent asked "Well our time was up kid besides I feel exhausted. Don't you." "Now that you mention it I kinda am" Gaster then falls to the ground. Both the human and skeleton turn to Gaster. Vincent walks up to Gaster and offers his hand. Gaster and Sans are surprised by the action. "Why?" Gaster asked "Cause its the right thing to do after a good *FIGHT" Vincent said. Sans envy's Vincents nobility. Gaster scoffs a bit, but accepts the humans hand. When Gaster fully stands up he says, "Thank you for *SPARING me Vincent" "No prob. I'm not really a guy to hold grudges". Gaster smiles "I guess not." he turns to his son who is looking elsewhere "Sans" Gaster called. Sans glanced at his father for a second then looked away, "Hey dad" "Sorry about before. The *FIGHT was supposed to be a test and I was glad you could be a part of it" Sans looked at Gaster "What kind of test?" "I've been studying soul fusion for a few years now and with you fusing with Vincent proved mine and Marcus's theory" "So why can me and Sans fuse?" Vincent asked "Its your connection" "Connection?" "Yes you both don't see it, but you two have more in common then you think." Sans and Vincent looked at each other. Gaster laughs, "You will see it when the time comes and soon you will want to fuse again" Vincent and Sans shrug. "Whose Marcus?" Gaster turned to Vincent "Oh yes I forgot to tell you. Marcus was my partner during my experiments...and he's your father" Vincent froze and couldn't breath "Kid you ok?" Sans asked. "My father worked with you?" Vincent asked Gaster "Yes" "So is he...a monster?" Gaster slowly nods "Yes. He's a wolf" Gaster summons a picture of him in a lab coat standing next to a wolf man with dark brown fur who is also wearing a lab coat. Vincent felt like he was gonna faint "I know this alot to take in, but I thought by now he would show himself to you" "Well he didn't and a monster can't be my father" Vincent said with disbelief "Well I'm sorry, but its true" "But how is it possible. Monsters were sealed in the underground" "Well yes, but Marcus used his magic to turn himself human. Then he found a way to open a window in the barrier to slip out, but once he did he couldn't come back. I'm assuming that while he was on the surface he met your mother and fell in love with her" "Oh. If thats the case then why did he leave when I was born." "Believe me your father isn't a man who would do something like that, but by my guess the spell he casted on himself to be human was wearing off. And when it did he must of went into hiding" "Seems reasonable, but wouldn't he have contacted me in any way" "I don't know I'm sorry." Sans puts his hand on Vincent's shoulder in a reassuring way "So does that make me a monster too" Gaster shook his head "Not fully. Since your mother is human your only a half monster" Gaster explained. Vincent nods in understanding "Believe me I know your father would have loved to see you grow up." "I get it." Gaster and Sans showed a look of sympathy. "Anyway I'm not gonna worry about that right now. I have a sister to look for" Vincent said walking away. "I know where she is" Gaster said calling to Vincent's fleeing form. Vincent stops in his tracks. He turns to Gaster, "What?" "Shes in Hotland" Vincents eyes widen "Are you being serious?" Gaster nods "Before you came to the underground another human came. A teenage girl. I found her when she fell down. She was unconscious so I took her and left her in certain robots care. I know he would be able to take care of her until someone came to find her. Shes in Hotland as we speak." This caught Sanses attention and Vincent notices. "Whats wrong Sans?" Vincent asked "My dads talking about Mettaton." "Mettaton?" "He's a robot like my dad said. He owns his own show. It would probably make sense that your sister is with him." Vincent felt hope and relief. His sister is alive and is indeed in the underground, "How do I get to Hotland?" Vincent asked "Just keeping traveling through Waterfall and you'll find a very big rock formation. Go through it and you will soon entering Hotland" Vincent nod and thanked Gaster. Before leaving Vincent said to the father and son, "You two should really talk things out. Its to late for me, but not for you guys." Both of them laugh nervously. "And Sans-" Vincent called out to the punny skeleton "-Gasters right. We should fuse again. It was fun" Sans chuckles and nods "It was. Plus, I actually liked the idea of having skin." Vincent laughs and walk off leaving the skeleton family to work things out. Fully knowing that Izabella is here in the underground and alive, Vincent can finally bring her home. Despite the future events and *FIGHTS that he will encounter he will do whatever it takes to find his sister and that filled him with Bravery.