Answers

Professor Mab was walking down a hallway, drinking a cup of coffee. He thinks to himself about his next move against the sins and what he will try next. "He keeps walking when the building started to shake before stopping abruptly. "Is he still fighting against them?" Mab thinks to himself. He walks to the training grounds of the base to see One For All fighting against the demon girls using the artificial One For All. He looks exhausted and breathing heavily. One of the demon girls appears behind him and Toshinori tries to attack her but he was held back by another demon girl that used black whip to hold back his attack and the demon girl sliced his arm off. One For All screams in pain before releasing his own black whip to slam the girl into the ground and float up into the air making the second demon girl holding him down float with him. He breaks out of Black Whip and grabs the demon girl and rips her head off before the second demon girl floats up towards him using Fa Jin to make herself faster allowing her to slam Toshinori into the ground. The demon girl lands on top of him and slices off his other arm making him scream in pain before kicking her off into the wall. Suddenly a black substance oozed out of his shoulders and reached toward his now severed arms bringing them back and reattaching them. He then activates smokescreen before disappearing and reappearing behind the second demon girl and grabs her neck. "You were a fine opponent." Toshinori whispers in the girl's ear before ripping her head off.

He breaths heavily and walks towards the exit only to see Mab there watching him. "Ah, professor. What are you doing here?" Toshinori asks. "I felt the building began to shake so I assumed you were out here again." Mab replies. "Well, it has been going well. I am not only stronger but I finally have full access to all of the previous user's quirks. Not to mention your artificial One For All really proves itself to be helpful. With each generation of demons I fight, I get stronger and stronger." Toshinori says. "You give me a lot more work you know. That aside I need to get ready. I'll be heading back to their world to finish off that wretched woman." Mab says. "Yes, I am well aware of your desire to kill that woman. You have been my most reliable subordinate and have assisted me in my growth so I am indeed indebted to you. Once you have finished assisting me I will assist you in your mission." Toshinori says. Mab just sighs and turns around. "Well, we have a lot of work to do but we're almost there." Mab says.

They both walk away and an old man appears from the shadows. "One For All. What a failure of a user. Your successor will surpass you and return One For All back to how it was meant to be used. I won't let you succeed." the old man says. His left eye turns purple and his vision shifts and he enters One For All. There he sees nothing but darkness all around him. His right eye turns red and a bright light appears and shines brightly in this dark empty void to which he finds all the users imprisoned in what seems to be some monster's heart. They all look unconscious, a black substance slowly raising from their hands. Christopher quickly turns his arm into blades and tries to cut them out but to his surprise, his blades broke Immediately in contact. "This is becoming a serious problem." the old man says to himself. The old man turned his hands back to normal and morphs into Christopher. "First time in a while since I had to get a bit serious." Christopher says to himself. He floats to the heart and both of his eyes turn dark green. A dark green substance leaked from his hand and covered the entire heart. As he did so the heart began melting away seeming as Christopher had used some kind of acid to melt the heart. This causes Toshinori to cough up blood before clenching his chest. Mab sees this and helps him up before bringing him to the medical room. The heart melted significantly allowing all of the users to fall out and that was when the darkness surrounding them suddenly surrounded Christopher like tentacles trying to bring him into the darkness. His left eye turns red and it all burns away and he brightened his light source making the darkness seemingly subsiding. He then walks over to the unconscious previous users and notices black marking seemingly slowly spreading throughout their bodies. His eyes turn light green and he sticks his hands out when a small light green mist started appearing and spreading around them. The mist appears to have stopped the effect of the black marks and it started slowly disappearing.

The souls of the previous users began waking up each standing up with surprise seeing Christopher. "Who are you?" Nana asks. "I'm just a humble old man." Christopher says before bowing. They all look at him with suspicion and confusion. "How did you get into One For All?" the first user asks. "I must've walked through the wrong door." Christopher replies. They all look at him with suspicion but Christopher tries to calm everyone down. "I apologize for the late introduction. My name is Christopher. I am here to help you. I was the one who freed you from your prison and I hope that in return you will do something for me." Christopher says. "That depends on what you want us to do." the third user replies. "I can't stay here for much longer so I'll make it quick. I want you all to try to fight against the darkness for as long as possible." Christopher asks. "We had already planned to do so but what do you achieve in us doing so?" the 4th user asks. "The longer you reject Toshinori the longer he will be unable to use your quirks. If he believes that using his powers too much makes him lose the other quirks at his disposal he will stall his plan to fight against Kurosu Tachibana, thus giving I and the second user of All For One enough time to prepare Kurosu and his brother for the fight to come. I will leave my light here. It will buy you all 2 days of rest and preparation before you have to battle against the darkness. So I hope this will allow you to at least give us a week to prepare them." Christopher says before bowing again.

They all paused and stared at the bowing old man. "I'll do it if you answer my question truthfully." the first user says before stepping forward. "What is it?" Christopher asks. "Why are you helping us in the first place? It isn't in your best interest to assist us at all. So why are you helping us?" the first user asks. Christopher pauses for a moment. He stares the first user in the eyes and they just look at each other for a moment. "Because I find it cruel to imagine such a kind and gentle soul's future is death and failure." Christopher replies. They all look at him with surprise and confusion. "What do you mean?" Nana asks. "Your world's future isn't a bright one in the least." Christopher adds. "So you can see the future?" the third user asks. "Correct, I have seen the future of both successors of All For One and One For All. For both of them, their future is death. I have befriended Kurosu and I find him an extremely kind individual and I've seen his brother's memories and know he is as kind and loving as his brother. Their future will result in their death without mine or the sin's intervention and I don't know about you but I don't like the idea of children dying when I've experienced first-hand kids dying for a cause seemingly justifiable but no matter how much you look at it is just completely wrong." Christopher says. Everyone went silent.

Many were surprised but the silence was broken by the first user. "What will happen to them if none of you interfere?" the first user asks. "With how everything is progressing, if I or the sins don't interfere Kurosu will die in 3 days, his family in 4, his brother and Eri on the 5th, and the rest of their world in the 6th, which will lead Toshinori to progress into a multi-universe calamity causing him to destroy world after world and inevitably dying in the strongest world, which he will die in defeat." Christopher finishes. "I see." the first user says. "So we don't really have a choice now do we?" the second user says and Christopher shakes his head silently. "Very well. We agree to help you." the first user says. "Thank you." Christopher replies before disappearing. "We're in a much more dangerous position than expected." the third user says. "It seems so. We will have to try our best then for the sake of our world and the rest." the first user says.

Back in UA, a meeting is being held by most of the heroes including Nezu, Endeavor, All Might, Mirko, and the others. They all sat together at the table when a man with large wings walked into the room. "I didn't expect to see you here, Hawks." Endeavor says. "Didn't expect to receive such a call in the first place." Hawks replies before sitting down. The heroes together all talked with one another before Aizawa opened the door. "They're here." he said before Meliodas, Ban, Kuro, and Christopher walk in. All the heroes stare at the four of them while Endeavor and Mirko look at them like their monsters. Kuro is incredibly uncomfortable with all the staring and just stands there confused and nervous. "Thank you all for coming." Nezu finally speaks. "I called you all here to finally confront you about the truth. We want to know what you all are and where did you come from." Nezu adds before Hawks interjects. "It's quite the difficult task being able to handle some of the strongest heroes in the world and not to mention forcing the entire world to kneel, well now that is something no normal person could do." Hawks says while smiling but with an incredibly sharp gaze clearly expressing his seriousness.

"We've tried to not push too much but you've pressed on us so much. We can't keep pretending like you are all normal, so we ask you to tell us the truth." Nezu says. "I mean, we already told you the truth before." Meliodas says. "I told you where I was from and I told you my age. I just left out my abilities." Meliodas adds. "If you're asking about where we are from then the Captain already told you what you need to know. As for me, I'm 1103 years old." Ban replies. "You're both not human now aren't you?" Hawks asks trying to understand what they both were. "I am but he's not." Ban says while pointing to Meliodas. The heroes looked surprised but Hawks kept on a straight face and pushed further. "What is he?" Hawks asks again. "I'm a demon." Meliodas replies. "Not just any demon. He's the Demon King in our world." Ban adds. Everyone was stunned hearing this. Everything made sense as to why he was so strong. "Don't try to put me on the pedestal alone. You're the King Of The Fairies." Meliodas adds. It wasn't as much of a cool name but it could make sense as to why Ban was strong as well. "I thought you said you were human?" Hawks pushed further. "I am, I'm just also the King of the Fairies." Ban says. "I see." Hawks says before writing something on a piece of paper. He then pulls out a remote and turned on the tv replaying their fight against the heroes when they first broke out of Kamui's Lacquered Chain Prison. "What were those marks on your bodies?" Hawks asks. "Oh, that? That's just the demon marks from Captain. He thought it would be a good idea to add to the scare factor." Ban replies. "If he can only get it then how did the two of you get it?" Hawks asks. "That's from good old Kuro. We asked him to use his quirk to make similar tattoos on both of us so we could get it. Pretty smart huh." Ban continues while patting Kuro on the head.

"So, the entire thing was a joke to you?" Hawks asks again with a slightly angered tone in his voice. "Yep." Meliodas replies. Hawks sigh's before responding. "I yield. I have nothing more to ask." Hawks says while writing on the piece of paper. "What a headache." Aizawa says. "At least we have fewer things to worry about." Hawks replies. "Aside from All For One being taken down we still have the second All Might and second Mirio to worry about along with the league of villains." Aizawa says. "Wait, did you say a second Mirio?!" Kuro says surprised. "Yes, what's the matter?" Aizawa asks. "Did he say his stupid punchline of being the "Man with a million kills"?" Kuro asks. "Yes, I am assuming you know him?" Aizawa replies. "Yes, he's my former mentor." Kuro says. Aizawa just sighs in disappointment. "Why am I not surprised." Aizawa says to himself. "I guess the reason he infiltrated UA was to find you then." Aizawa says. "Most likely, yeah." Kuro replies.

"Also." Meliodas interjects. "The name 'All For One' sounds familiar." Meliodas says. "He was the man All Might fought on tv." Aizawa says. "Oh! He's the masked guy, right?" Meliodas asks. "Yes, why do you ask?" Aizawa asks worried he's going to say something stupid. "I remember me and Ban fought him a while back." Meliodas finishes and it shocks everyone when All Might stood up in shock. "You fought against him?!" All Might yells.

"Yea, I remember it like it was just yesterday."