AN: I DO NOT OWN UNDERTALE! UNDERTALE IS OWNED BY TOBY FOX!
When they enter the lab, they see machinery spread about, with a large machine that is labeled: Soul Recreation. Frisk said "So… this will bring back Chara and Asriel?" Sans replied, "yup. It sure will. Athe only thing is… it needs a lot of energy to do so… DETERMINATION energy to be precise. so much so, that there won't be enough for a Reset. do you understand frisk?" Frisk nods. "ok" Asriel said nervously, "what do I do?"
"Just walk into the machine, I'll flip the lever." Frisk said confidently. Asriel walks into the machine as sans drew DETERMINATION from Frisk, until their soul turned orange, the soul of bravery. "so… I now have more bravery than Determination?" Frisk asked. Sans answered, "yup." Frisk replied, "Ok." As she pulled the lever. The machine flashed as smoke came out. Asriel walks out, now with his own soul. He hugs Frisk.
"Thank you, Frisk!" he says. Frisk said, "Your welcome." Chara brought up a good question. "how do I use the machine?" Frisk told them just to phase through the shut door. Chara did so and then Frisk pulls the lever. The machine flashed once again as smoke billowed out. The door opens to reveal Chara back to being herself. Chara told Frisk thank you before tackling Asriel. He yelped "Chara! I missed you too! Be careful!" Frisk giggled as she watched the siblings mess around. She said "Chara…. Asriel…. Maybe we should go back to Mom and Dad." Chara and Asriel nod in agreement.
Sans interrupted them. "i know you guys want to go… but first, let's get something to eat. Grilbz is on me!" The kids nod. Once inside, Frisk orders a burger, Asriel orders some fries, and Chara orders a chocolate shake. They all thank sans. "its not a big deal, now that everyone is done… time to go meet the king and queen." He said.