What if?
What if… the past makes a visit!
All Might and his Protege in form of his niece, Melissa Shield, were training for her to inherit All Might's quirk. For that, they needed to strengthen her body, and what better way to do that as a bit of community service.
So All Might implemented the: 'Get the quirk, overcome your limits' American Dream plan. It is basically Melissa cleaning the Takoba Beach Park, as it has become an illegal dump in the last decade, with All Might watching over her.
"How long will this keep going, Sensei?" She asks her uncle/teacher as she pulls a giant refrigerator along. "I don't think I can feel my legs anymore!"
"Ok, then stop for now make a few stretches and then rest a bit. It is very unhealthy to Overtrain and tearing a tendon could set you back months" He says and Mellisa simply nods, relieved that her uncle seems to still have a brain left... even if he tried to prove the opposite most of the time.
She then walks a few feet away behind a pile to make her stretches, don't get her wrong she fully trusts her uncle but she will not give any creeps a free show that may come along the walkway along the beach. Just as she is behind the pile she sees something strange a fridge with a heavy-duty lock on it. "Ehm, Dad, could you come here, please!" She yells from him and barely half a minute later he is by her side. "Look at that," She says as she points to the lock.
"That is indeed strange, why would someone… please step away and don't look." He orders as he buffs up. "I will open it and you will not look until I say so!" Her father orders and Mellisa simply nods as she turns around. All Might then grabs the Lock and crushes it in his hand opening the fridge in the process. The door opens and… a green-haired boy simply steps outside, stretching a bit but he doesn't seem to be in a bad shape.
"Hmm, hello good sir… could you tell me where and when I am?" The boy asks. He is wearing black suit pants, a white dress shirt, and a dark blue overcoat as well as gray dress shoes with silver metal on the front of them. A red glove is over his right hand and he has a pair of blue-framed, round glasses on his face. His clothes have a few tears here and there but overall they look good.
"Why were you locked in there, young man?" All Might asks but the young man just chuckles at that.
"I was bored and simply took a nap." The boy answers. "What is your name sir, oh it is improper to ask a name without introducing oneself first. My name is Ku." The boy then looks at All Might and even goes as far as to walk around the bigger man one time. "You are a lot like Yoichi-chan. Do you know the little boy… he had been so down after he didn't gain such a cool power like his brother." Ku says as he shakes his head at the memories.
Mellisa has meanwhile turned around and was watching the boy about her age talking to her father as if it was normal. "Ehm, we have the year 2xxx and we are at the Takoba beach park." Mellisa finally answers Ku's question.
"Oh, so that nap was longer than I have planned. Didn't that brat Tomura say that he would wake me up after 100 years… tsk, well who cares, you shouldn't cry over spilled time." Ku says as he regains his temper.
"Wait 100 years? How old are you?" All Might asks as he looks at the young-looking man in front of him.
"If my calculations are corrected then about 431 years, and I have slept the last 190 years from that. Did you perfect Space flight or fusion energy yet?" He asks them and this time Melissa answers.
"We have a few space fights for basic maintenance on the satellites in orbit but nothing beyond that… and Fusion energy is still the 'in 50 years possible pipe dream…" Melissa tells him truthfully and Ku looks rather annoyed at that.
"*tsk* so let me get this straight in the last 200 years, technology didn't make any progress but instead regressed. What did the brats do in the last 200 years." He grumbles before walking off.
"Ahh, did we just let wander and 400+ years old immortal wander of into a city where doesn't know the laws…" Melissa then realises but it was too late Ku was already gone.
A rather short one. I have basically given Izuku immortality. The plain old true immortality. He is one of the first Humans to have a quirk, Let's just go with the 13th, and he somehow knew The Shigaraki brothers.
Little idea to All for One aka the older Shigaraki brother… I think his name used to be Tomura but after all these years where he was simply called by his quirk's name he decided to abandon the name but he then decides that he can become Tomura again by giving Tenko this name followed by taking over Tenko's body. Maybe he even wants to be close to his brother, Yoichi, again and that is why he wants One for All…
See ya!
