AsunderTale 1
This is the UnderTale universe made to be just right...
Long ago, a war between humans and monsters ensued. Humans were easily far stronger. As they researched magic, they had their seven most skilled seal away the monsters. Humans were never meant to weild magic on their own. They had built eight devices called, "Monster Hearts" to make this possible. The first was simply a prototype, as had negative effects on the one who used it. This person was overwhelmed with "Crimson Charisma". The problem was that they didn't know how to maintain this broken Crimson Charisma. They decided to allow themselves to be used by a special hidden group who tested the extents of the Soul. The Crimson Charisma of this person was far too broken. It quickly dissolved into Noir Hate. They became so hated and hateful that a scientist killed them. Much later, this person's Daughter was born... Chara. Chara seemed to be able to generate a well of Crimson Charisma. Only the scientists knew how powerful Crimson Charisma was. Chara even held a grudge against humanity. Not willing to take the risk, Chara was sent to MT. Ebott. While there, Chara eventually tripped and fell into the depths of the mountain. They landed on a bed of golden flowers. Even the magic was strong enough to keep this from being fatal... although Chara did suffer a head injury.
Asriel: ...Are... Are you hurt?
Chara: ...
Asriel: What's your name?
Chara was so confused. They can barely even think right. They sat up... and did nothing else. Asriel picked up Chara's belongings that had dropped with her. This included a knife with her name engraved on it.
Asriel: Chara? That's a nice name. My name's Asriel.
Asriel helped Chara get up and quickly brought her home.
Asriel: Mom! Dad! I found this girl collapsed!
Toriel and Asgore quickly ran in.
Toriel: Honey, go get Dr. Gaster!
Asgore: R-right.
Asgore quickly ran off. He eventually arrived at Gaster's office.
Gaster: Asgore! It's good to see you. Sans, do you have those blueprints?
Sans: Here you go.
Asgore: Ga-
Gaster: Papyrus, go get some coffee for our guest.
Papyrus: Yes sir!
Asgore: Gaster, you need-
Gaster: Alphys, please bring me your altered notes.
Alphys: Wh-what?
Gaster: Alphys, I know you're very bright. Your documents hold things I never even considered.
Alphys: I'm just an intern...
Gaster: Yes. You are.
Things are always this hectic here. At least Asgore knew a way to get Gaster's attention.
Asgore: I found a human.
The whole place went silent.
Gaster: ...R-really?
Asgore: Yes, I have. The human's injured.
Gaster immediately grabbed some extra equipment and followed Asgore back. It was a short walk to Home.
Toriel: Asriel, please, just go stay in your room.
Asriel: But I want to know what that red stuff is.
Toriel: Asriel, please.
Asriel: Are they a boy or a girl?
Toriel: I... I can't actually tell... B-but just stay in your room for a bit.
Toriel eventually succeeded in getting Asriel to wait.
Gaster: Amazing... So this is how the humans look... Their soul is just as powerful as those mages. As for the injury, I'll need some time to see what could be used for such a deadly blow.
Toriel: Will they last that long?
Gaster: I have a good feeling that they will. Their soul is simply Crimson Charisma. It's a very dark red. It almost feels like they know that they're meant to be part of something greater. If we're lucky, this might even be pure soul energy instead of blood.
Toriel: Lets hope so...
A few days later...
Toriel: ...Wh-what?!
Gaster: Your fire magic-
Toriel: I know what you said, but that isn't possible! All these flames have ever done is hurt others!
Asgore: There was that one time, though.
Toriel: Th-that? That was some kind of mistake...
Gaster: Do you know how to heal others?
Asgore: During the war, there was a human with a green soul.
Gaster: Hmmm... Oh! Green is likely Jade Kindness.
Toriel: That human... During the fight, they healed humans AND monsters. I remember that her superior even approached her and convinced her to let the monsters die. Even then, she'd still use her abilities to make sure monsters died painlessly. Near the end of the war, I couldn't bring myself to hurt anyone because I thought of her too much. Then... I saw that someone had injured her in our few days after the war. I stood there and kept her company as she faded. When a human attacked me, my fire magic turned green and healed her instead. She convinced the other human to leave me be.
Gaster: Perfect. This should be easy for you.
Toriel: It was just a mistake.
Asgore: If that was just a mistake, then you can do even better on purpose.
Asriel: ...Um... mom...
Toriel: Asriel, I thought-... why are you crying?
Asriel: The human had this weird book with them... Please, lets give them a home... Their dad was killed by humans... It keeps saying things about how much they miss him...
Toriel: ...It should be easy. It'll be easy to give her a home here.
Asgore: Toriel, at least try.
Toriel: ...Everything's worth an attempt, I suppose.
Toriel held her hands out. Her green flames healed Chara.
Gaster: Perfect. They're mind is still a bit fragile, so it'll take a few weeks before they can start talking again.
Asgore: Thank you.