There were many powerful primary school characters in the anime.
1. Uchiha Dotto in Naruto: Dotto used to be an elementary school student who had the ability to transfer human consciousness to the moon. He was a very powerful ninja who could easily control the power of ten-tailed beasts.
2 Monchi D. Luffy in One Piece: Luffy had shown great combat talent when he was young and was one of the strongest primary school students. He had the ability of the rubber fruit, which allowed him to freely stretch his body into various forms.
3. Ishida Yulong in " Death ": Ishida Yulong was a character who had shown great strength since he was a primary school student. He possessed spiritual pressure and combat skills, and was one of the strongest youths in the Corpse Soul World.
4. Sun Wukong in Dragon Ball: Sun Wukong is one of the classic characters in Dragon Ball. He has shown great strength since he was a primary school student. He has the ability of the Goku Fruit to transform into a Super Saiyan with powerful combat power.
5. Shikata Suizo in Silver Spirit: Shikata Suizo is a primary school student with a strong personality and strength. He has sword skills and fighting skills. He is one of the most powerful characters in Silver Spirit.
This was only a small portion of the powerful primary school characters in the anime. There were many other characters in the anime that also had powerful abilities.