Memories
I was sleeping. When I woke up, I had no idea where I was. I was alive. Let me give some context. My girlfriend and I were tracking down Chara, and we found her. We tried to take her on our own, but as evidence by earlier in this paragraph, we lost. Back then, I was just a normal monster with a normal monster Soul. My girlfriend was a human who fell down into the underground. I helped her get out, and we became fast friends. Eventually we fell in love. Anyways, back to the story at hand. I sent a gaster blaster at Chara, but she dodged the beam and slashed at me. Me, being caught off guard, took the hit and fell. My Soul was shattered. The last thing I saw before I blacked out was my girlfriend. After I woke up, I saw my girlfriend lying on the ground. But something was wrong. With a closer look, I saw that her Soul was missing. I looked down at my chest, and saw that her Soul was in my chest. She gave up her Soul to save my life. She died so I could live. After that battle, I was forever filled with Determination. Determination to stop Chara for what she had done. That was my one and only goal in life. It is my one and only goal in life.
Now you may be asking, "Dorian, why do you have to kill Chara? What did she do?" This is what she did.
About two and a half years ago, Frisk, my old friend, was possessed by Chara. So I don't want to kill her, just get Chara out of Frisk's body. Anyways, to what Chara did. She fell down into the underground. She then proceeded to kill everyone in the underground. Undyne, Papyrus, Mettaton, Toriel, Asgore, Sans, everyone. Not one monster that she ran into was left alive. Luckily, Alphys evacuated most of the monster population, so most of them were alive. But those who tried to stop Chara were all killed. So yeah. That's what she did. That's why I must free Frisk and kill Chara. I need to save the world of monsters. And that's exactly what I was going to do.