In One Punch Superman, Saitama was considered the strongest human, and his true strength was still unknown. Although his strength and ability were described as very powerful, no one could be sure of his true strength because he had never been defeated. Saitama often used his own strength to solve problems, and his physical fitness and willpower were very strong, so he was considered a very powerful character.
Saitama's true strength was recognized by many in One Punch Superman. With the help of his neighbor and teacher, Dr. Orochi, people gradually understood his strength. Dr. Orochi had once told Saitama that he had powers beyond that of a human, and that he could strengthen himself through training. In addition, Saitama's teacher, Hungry Wolf, also called him the " strongest human." In addition, other characters such as Superman and Atom also acknowledged Saitama's strength.
When Sean was young, he was considered to be second only to the four Grandmasters, and his martial strength far exceeded that of other people. However, as time passed, Xiao En's strength gradually declined, and he could no longer compare to the four Grandmasters and their disciples. Therefore, it could be said that Sean once had the strength of a Grandmaster, but he gradually lost that strength as the plot developed.
Xiao En's Kung Fu was not clearly described as being at the level of a Great Grandmaster. In " Celebrating Years," Xiao En was described as a ninth-level master. Although he was a master among masters when he was young, his strength declined as he grew older. His performance in the movie was also overestimated by some people. He did not show the strength of a grandmaster that he had expected in some situations. Therefore, according to the information provided, Xiao En's martial arts were not described as being at the level of a Great Grandmaster.
Xiao En's Kung Fu was not clearly described as being at the level of a Great Grandmaster. In " Celebrating Years," Xiao En was described as a ninth-level master. Although he was a master among masters when he was young, his strength declined as he grew older. His performance in the movie was also overestimated by some people. He did not show the strength of a grandmaster that he had expected in some situations. Therefore, according to the information provided, Xiao En's martial arts were not described as being at the level of a Great Grandmaster.
Manga Saitama's progress speed is hard to define precisely. It can be rapid in intense moments but might slow down to flesh out details and relationships in different parts of the story.