Chara POV:

Once I had returned with Asriel back to New Home, I smiled at how we came across Bow and Undyne on the way through the CORE to the elevator.

"Hehe, looks like you two were out doing something, right?" Undyne smiled at us, me smirking at that.

"Yeah, we were helping out Coraline and Kristof gain new robotic bodies," I smiled at them, Undyne being confused at that, but Bow smiling.

"Who're they?" Undyne asked.

"I think she's giving future Chara and Frisk different names so they don't confuse the other monsters," Bow said.

"Correct," Asriel smiled, which made Undyne smirk as well.

"Well, good thing you're merciful, princess. I know that, if it were me in your shoes, I'd have simply killed the evil version of me outright. You've got a good heart. Just gotta hope it rubbed off on both of them," Undyne said with a small frown on her face.

"According to Hapstablook, who is now named Mettaton, both are cured of their bad ways. He could tell by the hue of their hearts. Coraline's and Kristof's souls are now bright red, as opposed to when I first had Coraline's soul, which is when it was almost a dark brown because of how evil she was. But in reality, hers, mine, and Frisk's souls are all the same color, that being red," I said with a smirk.

"Yeah, speaking of which, I noticed that Bow's soul is actually a different color from yours, as is Mitts's soul," Undyne frowned as we boarded the elevator, her statement raising curiosity from me.

"Really? What kind of color are they?" I asked.

"Well, my soul is almost light blue, like a cyan color. And from what Undyne said during a small sparring session with Mitts a couple days ago, his soul was orange. Maybe we could ask Mister Asgore about the different colors of souls?" Bow smiled.

"You know, I think we should," I smirked as we then proceeded through the castle and to New Home, where Undyne knocked on the door and Asgore opened it with a smile.

"Well, nice to see you all again. Chara, did you give up the souls of your future self and Frisk?" Asgore asked with a smile.

"Yes, I did, but they now have new names as well as new looks. Coraline is the future me and Kristof is the future Frisk. We gave them surnames because it'd just confuse everyone if there were multiple lookalikes in the Underground," I explained.

"I see. So you hope to train again today, correct?" Asgore asked, me nodding at that.

"And we also wanted a kind of lesson in soul colors. Like, what do the different colors of human souls signify? Because Chara, Coraline, and Kristof have red souls, but I have a light blue one and Mitts has an orange soul. How many colors are there?" Bow asked, Asgore smiling at that.

"That's a very interesting story. I'll tell you during our training session and on the way to it. Come along," Asgore said, us following him as he explained. "You see, each human's soul has a different color based on the personality of the human that owns the soul. For Chara and Frisk, their colors are red. Red is the most powerful soul color, as it is filled with the essence of Determination. Using it has numerous effects, namely that, if you know how to utilize it correctly, you can actually cheat death," Asgore said, me being surprised at that part. No wonder the future me and Frisk were so scary when I first encountered them. They were strong not just because of their experience, but also because they could cheat death and just try again and again until they finally defeated someone.

"Sounds dangerous. But that explains why the future Chara was able to have an attack powerful enough to erase the world," Asriel frowned.

"Indeed. As for Bow's soul color, it is Cyan. The personality of a Cyan soul owner is Patience, which is why you seem to be very good at waiting for me to trip up and take advantage with an attack of your own," Asgore smiled at Bow. And it was true. Bow usually fought Asgore in a matter similar to martial arts and always took advantage of slip-ups to get in for a counter blow, which didn't hurt Asgore, not even by a little bit, mostly because Bow wasn't really much of a violent person unless she was super scared or super angry, which only happened in the Old Ruins.

"As for Mitts's soul, the orange soul represents Bravery... though in the case of Mitts, from your description of him, Chara, it seems he tries to act brave, but is actually quite timid," Asgore said, me smiling at that.

"Well, he does get frightened easily, but if he does get backed into a corner, Mitts has been known to get out of it in more ways than one. He only gets brave when all other options have failed him," I smirked, being honest.

"I see... okay, we're here," Asgore said as we entered the chapel and we saw that he had converted it into a gymnasium of sorts. And that there were different places for us to train our muscles and athleticism. Namely, the weights, a biking machine, and some lines on the ground that went from one side of the chapel to the other, for races. "Okay, now to train. First, we shall start with the relay laps. As usual, you'll need to run from here to the end of the room and back four times and try to beat your previous record," Asgore said, me smirking at that as I didn't technically have one yet.

"Ready," I smiled.

"When I form a flame in my hand, then you may start running from the starting line. I'll explain the other souls while you run," Asgore said, me nodding at that as we all looked at his hand and, the moment it formed a flame, we dashed off the starting line as I heard him start speaking in my mind. "Blue souls represent Integrity, which correlates with their owners' honest views and moral standards. The more morally correct they are, the more powerful their soul is." By the time he finished explaining Blue souls, I had completed two laps while everyone else was a few seconds behind me. "Purple souls represent those who know Perseverance. Normally, users with a purple soul are much more capable in a fight, as, if they are damaged, they are completely invulnerable to pain for a good few seconds, which allows them to counter with no fear of getting killed early." As he finished with that explanation, I finished my four laps as everyone else made it soon after and I saw that the only one to beat their record was Undyne, according to her at least.

"Hah... that was my best so far," Undyne smiled.

"Quite right, you were 40 milliseconds faster. Now for the weights. Fifty rounds while I explain some more," Asgore said, me nodding as I went to the weights and picked up one that said 10 magigrams, which, upon me lifting it with both hands, I found that it weighed quite a bit, at least 70 pounds. But I was able to lift it so long as I laid on my back. "Green souls are my favorite ones, as they are the embodiment of Kindness. They do a lot of work to make the lives of others happy and are almost always passive fighters, preferring to end fights peaceably instead of hurting their foes. They also have a unique trait in that they can be immune to any damage if they face it head-on," Asgore said, me smiling at that as I pushed up and down with my weights and I felt my arms starting to feel the burn at around the halfway point. But I had to stay Determined, as dad had said.

"Yellow souls are owned by those who have a strong sense of Justice, allowing them to protect others and defeat evil foes. They tend to have special souls that can shoot projectiles at the opponent, but only if they know how to do so," Asgore explained as I got to 40 and felt the sweat pouring down my face. Only ten to go as Asgore spoke again. "And finally, there are monster souls. Monster souls are what make up a monster's entire being, but have no additional benefits to their strengths. Most monster souls comprise of hope, memories, and happiness, but this is just speculation. A monster soul is so intertwined with a monster, that if a weaker monster were to be attacked and killed, their soul would vanish along with the monster themselves, especially when facing a human with a high LV and EXP. That is why we monsters lost the 'war' against humanity. Our souls were simply no match for the combined might of all of those humans," Asgore said, me then finally getting done with number 50 and me putting the weight down as my arms felt like they'd fall off, but I could feel them pulsing. Pulsing with power.

"Hmm... it seems that our resident princess got pretty buffed up from those 70 pound weights, didn't she? Didn't know a kid your size could bench press that much," Undyne smiled at me.

"Yeah, right, you're able to bench press 150 pounds and you're only a year older than I am," Asriel smiled at her.

"I feel tougher, I will admit that... do we have any punching bags?" I asked with a smile.

"Yes, we do," Asgore smiled as he produced a punching bag that looked like it was filled with sand. I then focused and punched it with one hand, me gasping as my punch did something I didn't expect. It busted directly through the punching bag and spilled the sand all across the ground, me gawking at the strength I now had.

"Okay... now I should probably stop training altogether... unless that punching bag was made of a flimsy material?" I asked, Asgore looking at me with a smile and shaking his head at that.

"It was made of a durable substance that combines Temmie hair with the water in the marsh. It's not easy to destroy as effortlessly as you did," Asgore said, me shuddering at the power I had as I then clenched my fists. "You're clearly tough enough to survive any future fights we may have, young Chara. I'm proud of you," Asgore smiled at me, which made me blush a bit.

"Okay, okay, now it's my turn," Undyne smiled.

"Agreed. I'll just watch from the sidelines," I said with a smile as I went to the nearby bench to the side of the room and simply watched the rest of the training unfold.