when creating the bullets in the first place Dr. garaki was then able to get a version of Aries Quirk from this that couldn't be turned off and all for one took this to make sure that no matter what he reaches shigaraki's Battlefield where he can then do something to save himself.
Following a scorching defeat at Endeavor's hands, All For One used an unstable version of Eri's Rewind Quirk to revert himself back to prime fighting condition. This drastic measure was irreversible, meaning that All For One would slowly rewind himself into nothingness.
However, Chronostasis recovers and loads a Quirk-Destroying Bullet into a gun. He fires at Eri, knowing that Mirio will take the bullet for her. He does, and his Quirk is erased.
This is shown to be the case with Deku's Black Whip quirk and would theoretically apply to any other powers All For One has stolen and transferred to other people throughout his evil dealings.
Eri's Quirk is not only the most powerful, but it has the most potential. She can reverse time to a point before someone exists, which is pretty terrifying, but incredibly useful when done correctly. Old injuries and diseases can be completely removed from a person's body simply by reversing the clock.
Izuku was raised primarily by his mother Inko, who has the ability to make small objects float towards herself. His father, Hisashi, whose quirk allows him to breathe fire, is not seen due to him working abroad in the United States.
Anime Debut
The Luminescent Baby (発光する赤児, Hakkō suru akago?) was the first person in the world born with a Quirk.
The man that would be known as Nine was born with a Quirk that allowed him to control and manipulate the weather around him. His Quirk was immensely powerful and was viewed as a god-like ability. At the same time though, Nine was one of the many who felt outcasted in society and believed that it should not be this way.
Blackwhip was the first Quirk within the One For All that Deku awakened. Due to this Quirk's ability to produce webs of energy that can be used as ropes, this Quirk is quite useful. In combat, it can also be combined with other Quirks and is thus one of the best abilities that Deku possesses.
Fans know that his name is Hisashi Midoriya and that his quirk is fire breathing.
As Eraserhead says when he's escorting Deku to Nighteye's room, Eri's Quirk is not under control and is likely to destroy someone rather than heal them, which is why he says "We cannot depend on her Quirk" - specifically, they can't make use of it to save Nighteye.
Eri was initially in the custody of the Shie Hassaikai, a once-powerful yakuza group looking to regain its former glory. Its leader and Eri's "father," Chisaki Kai or "Overhaul," had been using her blood to manufacture anti-Quirk bullets and even performed inhuman experiments on her.
Her abusing methods has turned Eri into an evil, selfish, remorseless psychopath.
Only after All Might convinced her did she relent but made Izuku promise to not hurt himself any more to which he did. As of the breakout at Tartarus, Inko is made aware of the nature of Izuku's acquired Quirk, One For All.
During their fight against Nine, Midoriya transferred his powers to Bakugo by giving him a drop of his blood when they shook hands. This gave both students the power of the OFA Quirk, which they used to defeat Nine. However, after the end of their fight, the OFA Quirk returned to Midoriya.
All For One is, quite possibly, the strongest Quirk there is in My Hero Academia. It was formerly wielded by All For One and is currently in Shigaraki Tomura's possession.
According to the events of My Hero Academia so far, Deku grew up without a Quirk. He was given the OFA Quirk when he met All Might.
After observing how the quirk reacted to the bodies of the users, all the previous wielders concluded that One For All could not be held by a user who already had a quirk. Thus, Deku is the last successor to the quirk, making him their last hope to take All For One down.
Hellflame (ヘルフレイム, Heru Fureimu?) is the Quirk used by Enji Todoroki.
One of the most rare quirks is any type of healing or medical related quirks. ONE character has it in the known MHA universe, which is the Recovery Girl. And the other is warp. Eri's quirk is proabably one of, if not THE most rare quirk in all of MHA.
Smoke is a quirk used by Sayuri Saito.
The protagonist of My Hero Academia, Izuku Midoriya was the first Quirkless character to be introduced. Izuku was born without a Quirk, but despite that, he wanted to become the Number One Hero, just like All Might.
All For One is arguably the rarest and most powerful Quirk possessed by any villain in My Hero Academia. This Quirk so thoroughly defines its bearer that he's taken it as his name. All For One's Quirk lets him steal Quirks from other people and use them as though they were his own.
While not every One For All user has had multiple Quirks, some of them did indeed possess more than one, with the first user of One For All, Yoichi Shigaraki, being the prime example. He has access to two Quirks, as did Hikage Shinomori, and Diagoro Banjo.