Rumi Usagiyama, also known as Mirko, is the No. 5 Pro Hero in My Hero Academia. Being such a high ranking Hero, Mirko is extremely powerful, and her skills make her one of the best that we've been introduced to in the entire series.
During the raid to Jaku General Hospital, Mirko gave the fans a glimpse of how strong she really is, and it's fair to say that she's amassed tons of fans already. Given her high-level abilities as a Hero, she's better than most Pro Heroes and few can actually defeat her in combat. Here are five characters Mirko can defeat, as well as five she can't.
10 Can Beat: Mr. Compress
Mr. Compress is one of the members of the League of Villains, now known as the Liberation Front. Compress is one of the weakest members of the League which was proven to us back during the Bakugo abduction arc.
On the other hand, Mirko is easily one of the strongest known characters in the series and capable of taking on even the High-end Nomus. Although Compress is impressive, he is nowhere near Mirko's level. If the two were to fight, Mirko's victory is certain.
9 Can't Beat: Endeavor
Endeavor is the current the Number One Hero in My Hero Academia, taking over the job after the era of All Might came to an end. As expected of the Number One, he's extremely powerful, and he even managed to earn the praise of All For One.
Ever since he became the Number One, Endeavor had gotten even stronger and continues to progress at an outrageous speed. For Mirko, Endeavor is just too strong to defeat, and it'll take her quite some time to catch up to him.
8 Can Beat: Gentle Criminal
Gentle Criminal is the main antagonist of the Cultural Festival arc of My Hero Academia. His Quirk allows him to grant elasticity to anything that he likes, and, although the Quirk itself isn't all that powerful, the way Gentle utilizes it makes him unique.
Despite everything, Gentle wasn't able to defeat Midoriya, even with La Brava's help. Therefore, the chances of him being able to defeat Mirko are close to zero. It's better if he simply avoids confrontation with Mirko.
7 Can't Beat: All Might
All Might is the strongest known Hero in to ever exist in My Hero Academia. Before Endeavor, the title of the Number One belonged to none other than him. With the powers of One For All entrusted to him by Nana Shimura, All Might was able to become the Symbol of Peace.
His abilities were unmatched, and even someone like All For One couldn't fight him. Mirko pales in comparison to All Might in every way, and, no matter how much room she has to grow, she'll never be as incredible as All Might was during his days.
6 Can Beat: Izuku Midoriya
Izuku Midoriya is the protagonist of My Hero Academia and the current wielder of the One For All Quirk. Through sheer training and the guidance of several people, Midoriya has developed into quite a strong character, someone capable of taking down even string villains.
Despite that, he lacks the power required to beat Mirko, who is both stronger and faster than he is. Izuku is, however, showing tremendous growth, and, by the end of the series, he'll be the strongest of all the heroes, which includes even Mirko. For now, he isn't even close.
5 Can't Beat: All For One
All For One is the biggest villains in the universe and the man who led the League of Villains before Shigaraki Tomura. All For One's strength is comparable to the likes of All Might.
Although he's slightly weaker, the fact that he forced All Might to go beyond 100% means that he's capable enough to take down any other Hero who stands in his way. Just before his fight against All Might, he was able to defeat Best Jeanist, one of the strongest Pro Heroes, within seconds. Mirko stands absolutely no chance of beating him.
4 Can Beat: Bakugo Katsuki
Like Izuku, Bakugo is one of the main characters of My Hero Academia, and he aims to become the Number One Hero, as well. Bakugo is one of the strongest students in the series currently, and, with the training that he went through under Endeavor, it is easy to see that he's one of the best.
However, Bakugo still has ways to go before he becomes comparable to one of the top five heroes in the world. Mirko's skills are superior to Bakugo in almost every way and if the two fight, there is going to be only one winner and that's her.
3 Can't Beat: Mirio Togata
One of U.A's Big Three, Mirio Togata is easily among the strongest in the entire world. Despite being a third-year student, Mirio is strong enough to be compared to the top-level Pro Heroes.
According to Aizawa, he is the man closest to All Might even among pro Heroes, which automatically makes him comparable to the best. Although Mirko's strengths are her speed, power, and adaptability, she's inferior to Mirio in nearly all of those aspects.
2 Can Beat: Mt. Lady
My. Lady, although new to the ranks of the pro Heroes, is quite powerful. She can turn into a gigantic version of herself and do tremendous damage to the Villains who stand in her way.
Unfortunately for her, she still lacks experience, and her maneuverability is quite questionable as well. Keeping all that in mind, we think Mirko will be able to handle her without much trouble. Mt. Lady needs to practice harder if she is to compete with Mirko.
1 Can't Beat: Shigaraki Tomura
Shigaraki was a fairly average villain until recently. He's come a long way and become one of the strongest characters in the entire series right now. Tomura proved to be powerful enough to defeat Redestro, which goes to show that his growth has been nothing short of marvelous.
Furthermore, Shigaraki had undergone another surgery since then, and it is possible that he'll be turned into the strongest character in the entire series. Mirko is strong enough to take on most of the threats, however, Shigaraki Tomura isn't one of them.