I think they are as follows:
Tenya Iida
Iida comes from Class A, the first grade of Yuei High School in "My Hero Academia", and has a strong sense of responsibility. He is also the squad leader! In daily life, Iida is a particularly enthusiastic and serious classmate. He will actively help his friends, and will also criticize and correct everything he sees that is incorrect. In his opinion, this is the responsibility of the monitor. It’s your duty! (It seems that Midoriya-san made a very conscious choice when he made him the class president!) And after encountering the incident in which his brother Ingenim was hurt, Iida-san seems to have grown up more and is more confident about himself. He has mastered his personality more skillfully, and can even use the exhaust pipe on his lower leg to perform a burst sprint. The speed can prevent Midoriya, who has one for all, from reacting in time. You can imagine how fast it is!
Matekai
Sensei Kai is a pure taijutsu ninja from Konoha Village. He is not good at illusions and ninjutsu, so he has been focusing on honing his taijutsu achievements since he was a child. I hope that one day I can use physical skills to defeat other ninjas, so I have done a lot of training for this! It can be said that even while eating, Teacher Kai is exercising non-stop! To be honest, Mr. Kai gave us a very funny impression at first, and we didn’t even think he was very powerful. But since I saw him kill Kisame instantly with his "Hirutora" move, I know what it means to lose ten with one power. Hui! Moreover, in the final chapter when the Ninja Alliance fought against Uchiha Madara, Teacher Kai was also a very big highlight. Even the five shadows could not defeat Madara, who was reincarnated from the dirt. However, Teacher Kai, who had opened the Nine Gates, was able to defeat the six-path Madara. You can't find the north when you fight, so you can imagine how powerful it is! Uchiha Madara also said that he recognized Teacher Kai as the strongest person in taijutsu! (I actually have a little idea. If Mr. Kai can stay in that state for a few more minutes, I guess Naruto can play a lot less episodes, haha!)
The Flash
Because An unfortunate hit by lightning, coupled with some fusion caused by a laboratory explosion, gave Barry Allen his identity as The Flash. After he gained speed comparable to lightning, he acted as a defender of the city, fighting evil everywhere. It can be said that he is as famous as Batman and other DC heroes! However, after Barry gained superpowers, he could not forget something that happened many years ago, that is, his mother died at the hands of someone who looked like a speedster. With a lot of doubts in his heart, Barry was helping the city maintain peace while investigating his mother's incident. In American comics, Barry Allen is also a very representative figure of filial piety! Little K personally likes The Flash the most, haha. After all, he is handsome and can run fast. He is so cool!
Shunshin Yoichi
Just by listening to the name, you can tell how fast Yoruichi is. To be able to become the Shushin God in Soul Society, there is no doubt that she was so powerful back then. How many opponents have he conquered with his Shunbu! I still remember that when Kurosaki Ichigo and his group entered Soul Society to save Rukia, Yoruichi had to fight against Kuchiki Byakuya in order to stop the impulsive Ichigo, and Byakuya's Shunpo was also outstanding in Soul Society. He became famous quickly. However, Yoruichi easily teased Byakuya in various ways, and even said, don't forget who taught you Shunpo! Let me go, this is so good at pretending, but others have the ability to pretend! Shunshen Yoichi is so cool!
Golden Flash
There is a saying circulating in the ninja world, "If you see a golden flash on the battlefield, run away immediately and you will not be punished by military law!" Of course, the golden flash is famous. Namikaze Minato, and the origin of this sentence is precisely because Minato used his speed to conquer his opponents in the battle with the Raikage brothers! The Raikage, who is also said to be incredibly fast, and Kirabi, thought they could defeat Minato. However, our fourth generation, relying on the Flying Thunder God and his clever mind, succeeded in teaching everyone! Moreover, the fourth generation flying thunder god is also a ninjutsu that makes Uchiha Madara extremely distressed. You can imagine how terrifying he would be in his heyday!
The above are all personal opinions.