Characters with extraordinary powers often emerge in anime, characterized by rapid development in strength or abilities that significantly advance the narrative. These characters may not always be the protagonists or heroes, but they frequently showcase a remarkable increase in power that sets them apart from other characters, often being perceived as less than ordinary.
Sometimes their strength comes from rigorous training, innate potential, or even gifts received that enhance their abilities. A common theme among these characters is that they often start out at the same level as others but then evolve into formidable figures in their respective stories.
1. Saitama (One Punch Man)

Over three years, Saitama trained every day by doing 100 push-ups, 100 sit-ups, 100 squats, and running 10 kilometers, leading to his hair falling out and his becoming bald. He attained an unreasonable level of strength through his intense training, despite the simplicity of his routine. Saitama possesses the ability to defeat any opponent with just one punch.
2. Ragna (Ragna Crimson)

In a story revolving around a world dominated by dragons, Ragna, the main character of the anime Ragna Crimson, is a hunter who has endured hardships and experienced life to the fullest. He travels back in time to grant himself the immense power and experience he had gained, ensuring he does not meet the same fate as before.
This boost in strength is entirely illogical for his past self, and he can change his future with the knowledge he gained. He becomes powerful enough that he doesn’t need to expend all his strength to defeat foes. His adaptation to new abilities is crucial for his progression in defeating increasingly difficult challenges.
3. Ichigo Kurosaki (Bleach)

Ichigo levels up in a unique manner. Alongside his parents’ legacy, he possesses several distinct battle skills that play a large role in his development.
Ichigo quickly evolves into one of the most powerful characters in the series, achieving strengths that others typically take years to attain. His combat skills improve significantly, allowing him to train less frequently for critical battles, making him stronger after each training session.
4. Sung Jin-Woo (Solo Leveling)

Sung Jin-Woo starts at the lowest rank among hunters but utilizes his unique “cheat” system to level up quickly, transforming into a formidable figure in the hunting world.
Just a few days after leveling up, his physical abilities dramatically change, and all his stats rise significantly. Within weeks, he ascends to the highest ranks of hunters, overcoming all obstacles. Jin-Woo becomes powerful enough to handle high-level dungeons on his own.
5. Izuku Midoriya (My Hero Academia)

Izuku Midoriya has undergone one of the fastest power boosts. Despite not having a quirk in a world filled with superpowers, he inherits the quirk of All Might, the strongest hero, allowing him to become a powerful hero himself.
Midoriya also works hard to refine his abilities to unleash the full potential of his quirk. His body must endure significant strain when using it, especially during critical moments, and within a year, he manages to control his powers and becomes one of the leading heroes.
6. Gojo Satoru (Jujutsu Kaisen)

Gojo was born with unique abilities and a special power, but only after he died and was revived did he truly realize his overwhelming strength. His confidence, combined with his immense power, makes him a beloved character in Jujutsu Kaisen.
Gojo has reached a level where he confidently declares himself the strongest, and no one can challenge this claim. His extraordinary strength and mastery of cursed techniques are undeniably impressive. He begins to take on formidable challenges and can handle any curse he encounters.
7. Ein (Even Given the Worthless “Appraiser” Class, I’m Actually the Strongest)

Ein starts as a low-level member of a party trapped in a dungeon, where he struggles to survive. His life was saved through a miraculous encounter with a spirit and the protection of a certain guardian.
During his time in the dungeon, he was granted a new ability, allowing him to use an advanced version of a skill considered useless. From that point on, Ein’s strength increased rapidly as he mastered the newly acquired enhanced skills.
8. Touta Konoe (UQ Holder!)

Touta is portrayed as a character destined to become strong in UQ Holder! After facing a life-threatening accident, he is transformed into a vampire and gains supernatural abilities. However, he remains unaware of his potential until he must confront reality in a life-or-death situation.
Afterward, it is revealed that his grandfather had immense power, which Touta has inherited. His development accelerates as he learns to wield his powers under pressure, leading to his discovery of a vast hidden potential within himself.
Source: Gamerant