Tail (Mashirao Ojiro)
The worst quirk in class belongs to Mashiro Ojiro. His power is tail, and that's everything you need to know. He has a relatively strong tail, allowing him to pack an extra punch in hand-to-hand combat. He can also use it to swing around, similar to a capuchin monkey!
Updated on September 19th, 2022 by Tanner Fox: Chapter 336 of the My Hero Academia manga revealed that Class 1-A's Yuga Aoyama was the U.A. traitor, though he was made to do so against his will.
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.
One For All offers immense durability, and a variety of other useful abilities, but none of them are as overpowered as Overhaul. With this Quirk, all Kai has to do is touch the current wielder, and their body will be blown apart instantly, and One For All will be destroyed as well.
1 Weaker: Spinner
Spinner is weaker than Deku, especially now that he's awakened three more Quirks and improved his control over One For All.
Class A must have been at or at least close to the level of strength they've been displaying in the ongoing arc when they confronted Deku. If they managed to land these kinds of attacks, they could do some serious damage even to One For All's successor.
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.
One of his weakness is however that he cannot use his flame for extremely long periods of time as it burns his body due to the high intensity of the flames. One of Dabi's most powerful attacks which was also his father's signature technique when battling opponents is known as Flashfire Fist.
6/16 - All Might defeats All For One!
All For One is incapable of stealing One For All from its wielder, as that Quirk, by its very nature, can only be passed on if the present wielder wills it.
Currently, Hisashi's work has taken him abroad, leaving Inko and Izuku alone. This is everything that's been revealed about Izuku's father, but what's interesting about all of this is that everything that is revealed about Hisashi was either from Inko or the creator Kohei Horikoshi.
As Bakugo's quirk relies heavily on sweat production, he is at high risk of dehydration if he doesn't drink enough fluids and electrolytes in replacement. In support of this theory, whenever Bakugo overuses his quirk, he is shown to develop muscle cramps in his arms and shoulders- which are symptoms of dehydration.
While Shigaraki is five years older than Deku, Shigaraki didn't manifest Decay until age five, leaving roughly a year for Deku to manifest the quirk and have it stolen by Dr. Garaki.
He was revealed to have been the "U.A. Traitor", reluctantly aiding the League of Villains and causing most of their encounters with U.A. High. During the Final War, Yuga has ended his association with the League of Villains, choosing to instead help the heroes defeat All For One.
For example – the character Bakugo is an extremely toxic angry person and continuously bullied the character Midoriya throughout his whole life, even going as far as telling him to kill himself. Even in high school, Bakugou continued to bully and harass Midoriya.
2 Kirishima's The Traitor: Sitting on the Sidelines
Kirishima was not involved with the fighting that occurred during the League of Villains attack on the training session.