Backstory: Izuku was a young lad who wanted to become a hero like his hero, All Might until one day the doctor told him that he doesn't have a Quirk on his own which is one the most important thing to have in the world of My Hero Academia. He soon met his hero All Might and his body wasn't what it used to be. He needed a successor to take his place and he needs someone to be a true hero not some glory hog but someone who's body will move on their own to save someone when a goo villain has a kid named Katsuki Bakugou and Izuku's childhood friend turned rival. All Might found his successor and even going from a Boy Bod to a Man Bod, he has a long ways to go to get the full power of One For All. Considering that he and his class often end up in hero vs. villain wars that's not gonna be a problem considering he has learned how to use powers that All Might has never had.

Background:

-Real Name: Izuku Midoriya

-Age: 16

-Blood Type: O

-Originally Quirkless

-Favorite Food: Katsudon

-The biggest All Might fan ever

-Has more quirks than All Might

-Is the best fighter of all of his classmates

-Became strong enough to casually talk to the vestiges of One For All

-Last Wielder of One For All

Equipment:

-Iron Soles

-Air Force Gauntlets

-Mid Gauntlet

Quirks:

-One For All

>Stockpiling Quirk and a Quirk for passing down the torch

-Gearshift

>Boosts speed

>Gears: Low Gear, Second Gear, Third Gear, Top Gear, and Overdrive

-Fa Jin

>Builds kinetic energy through regular movements

-Danger Sense

>Allows him to detect immediate danger

-Black Whip

>Creates Black Tendrils

-Smokescreen

>Makes a Smokescreen

-Float

>Which makes him float into the air

Vestiages of One For All:

-1st User: Yoichi Shigiraki

-2nd User: Unknown

-3rd User: Unknown

-4th User: Hikage Shimouri

-5th User: Daigoro Banjo

-6th User: En

-7th User: Nana Shimura

-8th User: Toshinori Yagi

Moveset:

-Wyoming Smash: Deku draws 100% of his strength into his left arm, then proceeds to strike down his opponent on their head, releasing an immensely powerful shock wave. This smash attack was first used against during the war with the Paranormal Liberation Front.

-Detroit Smash: A signature move Deku mimicked from All Might. The move is a simple and straightforward punch focusing all of One For All's stored power into the fist. Used by Deku in countless battles, this move is powerful enough to generate massive shock waves and blow away even the strongest opponents.

-Delaware Smash: Deku channels One For All at full strength on his fingers and flicks them to generate a large shock wave, with enough power to create a fissure in a lake capable of dragging dozens of villains towards its center, and making them unable to escape. It was later used against to break through his giant waves of ice during the Sports Festival.

>Delaware Smash Air Force: Deku uses his Air Force Gloves to fire a compressed air blast against his enemy. It has enough force to hurt and stun in mid-air, giving Deku an opening to catch up to him. This technique requires at least 20% of One For All's power to be used, and he can fire up to four wind blasts at once with one hand.

-1,000,000% Delaware Detroit Smash: The strongest smash in Deku's arsenal, which consists activating One For All at 100% during an adrenaline rush and then striking his opponent with a full-swing attack. When performing the super move, Deku uses a full-handed Delaware Smash, and then delivers a devastating Detroit Smash. At the climax of his fight against , Deku was able to overpower and launch him hard enough to create an enormous crater on the side of a mountain.

-Texas Smash: Deku concentrates all his strength into his right fist, and then launches a mighty smash with enough power to blast a city with air pressure. A super technique first used against Shigaraki to overload his regenerative abilities.

-One For All: Full Cowl: This technique allows him to use up to 45% of One For All across his whole body, making the energy flow through him instead of concentrating it in just a single place. Activating this technique gives him enhanced strength, durability, and speed. It also prevents him from shattering his bones whenever he uses One For All. However, in extreme situations, he can use Full Cowl up to 100% at the cost of severe damage to his body.

>One For All: Full Cowl - 5%: Deku's first state of Full Cowl, developed with the help of . This power-up grants Deku enhanced superhuman strength, as well as a higher level of mobility that allows him to jump between buildings with ease. With this small percentage, Deku can break through steel walls and dodge even bullets.

>One For All: Full Cowl - 8%: A level of One For All greater than 5%. This increase in all his stats allowed Deku to surpass 's power and speed during their second battle. This boost in strength already makes Deku one of the strongest students in his school.

>One For All: Full Cowl - 10-15%: At the time of his Hero Work-Studies in the Endeavor Agency, Deku manages to rise his normal limit of One For All from 8% to 10%, and up to 15%, far improving his physical capabilities to new heights, with him now being able to properly control Blackwhip, and using it in conjunction with his Air Force to defeat any kind of villains.

>One For All: Full Cowl - 20%: First used against , Deku surpasses his limits at the time and uses 20% of One For All's power, distributing it across his body and giving him a significant boost in strength, enough to be able to generate strong shock waves with his attacks. As time went on, Deku was increasingly capable of using 20% without needing to strain his body too much.

>One For All: Full Cowl - 30%: A technique that allows Deku to consistently use 30% of One For All without any drawbacks, gaining a strength above all previous percentages. He used this level of One For All near the end of his first year of high school, during the war against the Paranormal Liberation Front. He initially used 30% alongside 45% until he could use the latter percentage normally.

>One For All: Full Cowl - 45%: After his strenuous training with and , and his brutal battle with , Deku manages to raise his output of One For All to 45% throughout his entire body, increasing the amount of strength at his disposal to a much greater extent than ever before. This is his current level of One For All. Although, he can temporarily break this limit using other Quirks such as Fa Jin.

>One For All: Full Cowl - 100%: Deku activates One For All to its fullest extent through his body, granting him a tremendous boost in strength and speed, reaching All Might-like levels of power and allowing him to beat up in his final form. He was able to wield Full Cowl 100% in his battles against and without needing the help of 's Rewind Quirk.

-One For All: Full Cowl - Shoot Style: A variation of Full Cowl that Deku developed to solve the issues caused by his increasingly damaged arms. He channels the power of One For All primarily into his legs and lower torso, allowing him to use their natural greater strength to enhance his firepower. Shoot Style consists of maneuvering the body with fast and precise movements to deliver mighty kicks, making Deku an incredibly mobile and agile combatant.

>Manchester Smash: Deku leaps into the air and flips around using the ceiling to bring down an axe kick upon his opponent. Although managed to dodge it, it broke the ground thoroughly enough that Overhaul wasn't able to completely retaliate using his Quirk.

>St. Louis Smash: Deku propels himself from the ground, before swinging around his body to perform a roundhouse kick to his opponent's face.

>United States of World Smash: Deku uses 100% of One For All's power and delivers a powerful head-on kick to his opponent.

>St. Louis Smash Air Force: Deku performs his signature St. Louis Smash using 45% of One For All's full output, firing a massive shock wave the size of several city blocks. He used this move to stop 's Decay from spreading across a city.

>Faux 100% Manchester Smash: Deku uses 45% of One For All and then combines it with other Quirks such as Fa Jin and a slingshot version of Blackwhip to enhance his speed and deliver a mighty kick comparable to a 100% attack. He used this technique to blitz and break her Rifle Arm.

-Blackwhip - Froppy Style: Deku mimics 's style by releasing Blackwhip from his mouth, moving around with great agility even if all his limbs are unusable. He first used this technique to protect from 's onslaught.

-Blackwhip - Pinpoint Focus: Deku focuses Blackwhip on a single point, shooting it from his arm with precision towards his opponent at high speeds, and then using the tendril as a grappling hook to increase his already incredible speed even further.

-Smokescreen - Full Blast: Deku instantly produces an enormous cloud of smoke that obscures his opponents' vision while also possibly obstructing his own. Deku used this move against to give himself some time to prepare a counter plan.

Feats(Strength and Durability):

-Defeated Stain, Dynamight, Overhaul, and Muscular

-Scale to All Might and All For One

-Scale to Gigantomachia and USJ Nomu

-Defeated Nine

-Defeated Class 1-A and 1-B

-Broke Shigiraki's jaw

-Tanked an Air Cannon from Shigiraki

-Tougher than Endeavor

-Fuax 100% gives him power of Prime All Might

Feats(Speed):

-Faux 100% gives him speed of Prime All Might

-Reacted to Nine's attack

-Black Whip outsped Shigiraki

-Faster than Gran Torino

-Scales to All Might and All For One

Stats(Strength and Durability):

-Multipliers of One For all

>Since Deku is able to access power similar to All Might in his Prime with Fa Jin and Black Whip and go past it with Gearshift. I think it's safe to say that the multiplier used for Prime All Might can be used for Deku's full strength with 100% of One For All which is 60x, along with Fa Jin and Black Whip will be both a 60x, as for the Gearshift quirk, it increases Deku's power through several settings Low Gear, Second Gear, Third Gear, Top Gear, and Overdrive. Since My Hero Academia often have Quirks with similar operations with different rules to follow like Kirishima's Hardening and Tetsutetsu's Steel quirks. I'm gonna get multipliers from a quirk similar to Gearshift which is Overclock which has multipliers of 3x, 10x, and 24x so that would mean that Low Gear is 3x, Second Gear is 10x, and Third Gear is 24x, but since Deku can go faster than All Might in his Prime that would mean Top Gear is a 60x multiplier and Overdrive is a 60x multiplier. However the Gearshift has been boosted to immense degree to the point where it's a last resort so that means each gear is multiplied by 60

>Normal 100%: 60x

>Fa Jin: 60x

>Black Whip: 60x

>Gear Shift: 180x, 600x, 1440x, 3600x, 3600x

-Defeating Nine

https://youtu.be/xLvoGjTqSNs

>Both him and Dynamight managed to beat Nine and Deku has grown stronger since then that's 158 Teratons of force

>158 x 60 x 60 x 60 x 180 x 600 x 1440 x 3600 x 3600 = 68,786,321,999,999,996,526,592 teratons or 3 foe which is Large Star Level

-Tiamat missle scaling

>1 of these missiles have a force of 638.1 megatons

>638.1 x 60 x 60 x 60 x 180 x 600 x 1440 x 3600 x 3600 = 277,800,960,000,000,000,000,000 megatons or 278 ninatons which is Dwarf Star Level

-Gigantomachia Scaling

https://youtu.be/y2ElPGBm9Bo

>According to Death Battle, Gigantomachia was able to unleash a force of 3 Gigatons

>3 x 60 x 60 x 60 x 180 x 600 x 1440 x 3600 x 3600 = 1.31 Tenatons which is Dwarf Star Level

-Shigaraki scaling

>Shigaraki uses All For One the first time and disperses cloud with a force of 2 gigatons

>2 x 60 x 60 x 60 x 180 x 600 x 1440 x 3600 x 3600 - 871 ninatons which is Dwarf Star Level

-All Might changing weather

>According to Death Battle, All Might was able to unleash 24 gigatons of force in a weakened state

>24 x 60 x 60 x 60 x 180 x 600 x 1440 x 3600 x 3600 = 11 tenatons which is Small Star level

Final Verdict: Small Star Level

Stats(Speed):

-Faux 100% speed = Prime All Might

>During his battle against Lady Nagant, his top speed at the time was Mach 101 or 77494.2 mph

>Which means Deku in his normal 100% state can do the same speed

>77494.2 x 60 x 60 x 180 x 600 x 1440 x 3600 x 3600 = 562,293,349,999,999,998,492,672 mph or 838,492,920,000,000x the speed of light

-Scaling to All Might

>As for All Might's speed feat, he was fast enough to go from Might Tower to the Tokyo Sky Egg

>Which is a 9 km or 6 miles in 1 second is around 21600 mph or Mach 28 which is High Hypersonic

>Since All Might did this feat in a weakened state

>21600 x 60 x 60 x 60 x 180 x 600 x 1440 x 3600 x 3600 = 9,403,699,700,000,000,072,220,672 mph or 14,022,815,000,000,000x the speed of light

Final Verdict: MFTL+

Weaknesses:

-Using 100% of One For All's power will break the bones of the limb on which it is used. Although, Deku has shown this doesn't hinder his movements due to his enormous stamina and pain tolerance. 

-While the damage inflicted to his body has been decreased due to his constant training and stronger physique, he still cannot fight at 100% for more than a few minutes before collapsing. 

-Danger Sense will not trigger off if the opponent has no true malice or intent to hurt Deku, which can catch him off-guard. 

-Considerably strong negative emotions can cause Danger Sense to be overstimulated. 

-Blackwhip can get out of control if the user does not keep his emotions in check. 

-One For All is susceptible to being taken if the thief's will is stronger than user's.

-Gearshift is too powerful and can only be a last resort

-Using his stronger techniques greatly damages his body.

-Opponents that can outspeed him or withstand several of his blows are capable of overwhelming him.

-His strategies tend to be pretty reckless.

-Constantly puts his own life at risk to protect others.

-Pushed Todoroki to use his fire quirk despite the fact that he could have won against him if he didn't.

-Hardly ever goes all out.

>Especially against other humans.

>When he feels it necessary, he will not hesitate to break most of the bones in his arms to continue fighting.

-Due to the strain caused by One For All, his ligaments are greatly damaged.

Possible Opponents:

-Steven Universe

-KO

-Korra

-Invincible

-Delsin Rowe

-Miraculous Ladybug

-Wonder Woman(DCSHGG2)

-Mob