Preparation

                                    

                                          
Chara woke up confused. They knew that she did make a deal with Gaster, but how would he help.
"Hello Chara." Gaster said from behind.
"Gaster?! What are you doing here?" Chara asked.
"I need to help you so I must follow you. No one else can see me only you." Gaster said.
"Alright so how do we start this war?" Chara asked.
"Getting right down to business I see. Well we must plan an incident that will cause humans or monsters to strike." Gaster said.
"Do you have any ideas?" Chara asked.
"Well I do, but we need to kill a few monsters." Gaster said.
"Wait I thought we were trying to hurt the humans!" Chara yelled.
"Yes, but for this to work we need to sacrifice some monsters. This is how it will work. You will kill monsters making it seem that the humans are killing them off. That will make the monsters mad and want to start a war. The humans will fight for anything so they will fight back. As ambassador to the humans you can say that this war will begin on a certain date then prepare from then on." Gaster said.
"Okay so do I kill major monsters or minor?" Chara asked.
"Start out with some minor and move onto some slighty major ones." Gaster said, "Also put on some gloves."
"Why?" Chara asked.
"Because I will give you this knife. It has the fingerprints of a monster hater. You can frame him for murder. Start out with Froggits and Whimsums then move onto more popular monsters. Also I will bring you a new weapon each day to make it seem like a war is about to start." Gaster said.
"Alright where is the weapon?" Chara said.
"Right here." Gaster said holding out his hands.
Chara put on some gloves and took the weapon. She went outside and walked around looking for a private place to murder a monster. Chara found a place under a bridge where a group of monsters were hanging out. When the monsters saw Chara with her knife they started a battle. Chara easily and one the battle between all of them. Chara dropped the knife and went home. 
                          
On the news it showed the bridge and the remains of the monster dust with the weapon. The person accused of murder said he didn't do it, but no one belived him. Chara continued murdering monsters. They even began murdering humans. 
                          
Asgore was having a tough time in his castle. He didn't expect humans to begin murdering monsters and vice versa. It seemed like a nightmare. He thought everything was going to be wonderful and happy. The monsters were on the surface, his son was back, but the murders were happening. Asgore continued filing the reports praying that a war would not begin.
                          
Frisk was very disappointed in Chara. Once Chara got their body, they began a killing spree. Frisk could see W.D. Gaster and knew he was up to no good, but Frisk had no hope of coming back. They may as well been dead. The only person that could hear Frisk was Chara, and they wouldn't care. Frisk hoped that Asriel or someone could make Chara stop.
                          
Asriel knew it was Chara. Chara was the one murdering them. He had seen it with his own eyes. One day Asriel was walking around the town he heard a monster begging for mercy. He saw an alley way and saw Chara kill a innocent Final Froggit. Asriel ran off. He wanted to tell Alphys right away that Chara was back, but he thought that the onky way to get rid of them was to destroy Frisk at the same time. He didn't know what to do. It took a few days, but Asriel decided to tell Alphys. He walked to the lab and stepped inside. Luckily Chara was gone. He saw Alphys and walked to her.
"Alphys?" Asriel said.
"Yes Asriel?" Alphys asked.
"I have some news and it's bad." Asriel said.
"W-what is i-it?" Alphys asked.
"Chara's back, and even worse, they are the ones murdering the monsters and humans." Asriel said.
"W-what? H-how long has it been?" 
"A while. I'm sorry I haven't told you this sooner." Asriel said.
"So w-we did f-fail at saving F-Frisk." Alphys said.
"There has to be a way to save Frisk, right?" Asriel asked.
"I'm s-sorrt, but I t-think the o-nly way to save Frisk is to k-kill them." Alphys said.
"No way. But it's Frisk we're talking about! Is there really no way?" Asriel said.
"I-I think i-it's the o-only way." Alphys said.
"Oh it is. I see then. Well so be it. I'm going to leave." Asriel said as he walked out the door.