In chapter 322, Bakugou Katsuki reveals the real reason why he began bullying Deku so long ago when they were kids--and it's not what fans thought.
In the earlier seasons of My Hero Academia, Bakugo is shown as Deku's bully, but he is finally able to grow out of it.
Everyone told him how wonderful he was and how amazing his Quirk was, and how sad it was that Midoriya had no Quirk. We know this was the start of Bakugou's bullying of Midoriya; he called Midoriya useless and worthless and weak. He pushed him around despite Midoriya's obvious adoration of him.
Deku's lack of a Quirk made him the last person Bakugo expected to receive sympathy from, and he resented him for showing it.
He is insecure about himself and feels like deku is braver and more of a hero than he is, and bakugo expels this insecurity by needlessly picking on midoriya.
However, it is revealed in the Endeavor Agency Arc that Katsuki has chosen a hero name for himself, but has not revealed it to anyone yet. His hero name was finally revealed as Great Explosion Murder God Dynamight in the Paranormal Liberation War Arc.
We see his atonement for his past with Deku, and we see it on a grand scale, sacrificing his life and body for the kid he used to bully. Bakugo is aware of everything he put Deku through, as the flashbacks show, and that's why it means so much when he atones.
The first thing to understand is the actual meaning behind Kacchan. It's a portmanteau of Bakugo's first name Katsuki and the "chan" honorific. This is normally used for small children, cute girls and close friends. It can also be used for older boys.
Mitsuki hit on Masaru rather aggressively, making him say yes to a date. After a long time of chasing him, they eventually got married and had their son, Katsuki, sometime later.
His Quirk is Explosion (爆破), which allows him to make explosions from his hands by detonating the nitroglycerin-like substance he sweats; throughout the series, he learns various different ways to apply this.
Katsuki Bakugo will essentially sacrifice himself in order to defeat his enemy. "Didn't All for One ever teach you that you can lose the battle and win the war? That's the first thing I ever learned at My Hero Academia." Katsuki Bakugo's final words will be "I win" and he will fall over dead with a smirk on his face.
It all came to an end when Katsuki Bakugo, finally catching up to his rival, confessed everything he'd always wanted to tell him and apologized. It was such a shocking moment that even Midoriya had to give up the fight.
Izuku's quirk, One For All, can stockpile one's power, increasing the user's physical capabilities and being transferred from one person to another. Since this quirk can be passed down from user to user, the different quirks of the previous One For All holders also become embedded into One For All as well.
Mirio Togata
He is the first person to give her hope that she could be free of Kai and the Shie Hassaikai. He later invites her to the school festival and holds her in the air for her to see Izuku perform. Since then, the two have become closer, with Mirio becoming an older brother figure for Eri.
Deku's final quirk is known as 'gearshift'. It's a quirk that is activated via physical contact. It allows the user to change the velocity of anything they touch, meaning they can spontaneously slow things down, or speed things up.
It's a shortened form of Katsu-chan, pronounced in a cute/childlish way. Since "Katsu" in Bakugou's name means "victory" it could kinda mean "Vicky", "Vikky", "Lil' Victory", but it basically is just a a short, cute form of a name, like Bobby or Johnny.
If you take a leaf through a Japanese dictionary, the first definition of deku you'll find is simply “puppet” or “wooden puppet”.
In chapter 245 of the manga, Midoriya calls Todoroki by his name; "Shoto". This is his hero name.
Just in that brief time he made direct contact with Shigaraki, Bakugo had taken a ton of decay damage. Shigaraki bloodies the right side of his face, and wrecks his gear completely. Luckily it seems like he hasn't been totally blinded, but his entire right arm is destroyed by Shigaraki too.
Edgeshot will ask Mirko to keep Shigaraki busy while he finds a way to start Bakugo's heart. The Ninja Hero has a deep understanding of the human body, so he uses his unraveling powers to reach the kid's heart. Edgeshot aims to complete the missing parts of Bakugo's heart to revive him, but there's one catch.
In order to try to protect people, Izuku left UA and is working with All Might and an elite squadron of heroes as he goes through his Batman phase—better known to fans as Dark Deku.
3 Edgeshot's Quirk
Edgeshot used his Quirk to save Bakugo after he was left in a near-death state by Shigaraki Tomura.
6 Bakugo Gets Very Jealous Of Midoriya's Progress
Since Bakugo is used to being the stronger of the two, he lashes out when Midoriya's new power begins to grow.
For those who don't know, his dad's quirk causes his sweat to become explosive when he rubs his hands, but cannot forcibly secrete the sweat itself. His mom's quirk allows her to forcibly secrete a smooth liquid from her skin.