Inko was shocked and confused about her son. This wasn't like her son. He was more gentle and relaxed. And as inko was a hero for more then 20 years, she could feel others killing intent and izuku right now radiated a killing intent, the same of a great villain. "What have you done to my son?" Inko said as she got up.
The sudden movement caused to toshinori to wake up.
Almost immediately, allmight took a stance. 'Oh I'm hurt! You would fight your son?' Izuku said with a small giggle. The two could clearly feel this wasn't like there son. Izuku stopped laughing immediately and told the two worried parents,
'relax you two. I'm not harming your son.  I am your son. Whatever damage done to me would not affect izuku but his 'split' quirk.'  Inko looked at izuku to see if he was lying but she didn't feel anything but the truth. Toshinori spoke up and asked, "What is the split quirk?".
Izuku extended his hand and surprisingly, all Might got pulled into his hand. Then, 'izukus' arm glowed black and all Might fell down. Not able to get back up. Toshinori looked down to see pitch black chain holding him down.  'The split quirk is me. I am izuku but I'm not Izuku. I have my own sets of quirk and i have my own identity. I shall only pop out when I'm needed or when i want to.'
Inko then asked, "What shall we call you?"

He pondered for a bit until he answerd 'X'. Inko and all Might both felt a shiver when they heard x speak. It was almost like as if they were speaking to a higher being then them selves. X turned around and walked back to his room. When x reached the outskirts of the kitchen, he raised he hands and said, 'see you around heroes.' The two heroes were wondering if this was a bad thing or a good thing. They decided to wait around a bit to see if x was harmful or a benefit. But if x were harmful, what could they do. He singlehandedly brought the symbol of peace down to his knees.

• • • 10 years later• • •

Sorry for the shirt chapter...