There's 'Revolutionary Girl Utena'. The main girl is strong and capable of fighting. The manga explores her growth and her battles both physically and mentally.
One such manga could be 'Fist of the North Star', where the female characters show great fighting skills and strength.
One could be a manga where the girl is a martial arts expert, constantly training and defeating opponents.
Well, one possibility could be a manga where the girl has special powers and uses them to solve problems in the cafe.
There are many! One example could be 'One-Punch Woman', where the main character has insane strength and takes on various challenges.
There's 'Sword Art Online' where Asuna shows both strength and beauty. The manga depicts her powerful skills and charming appearance throughout the story.
You might want to check out 'Sailor Moon.' Usagi Tsukino may seem initially naive, but she grows into a strong and determined girl throughout the series, facing off against powerful enemies.
Well, 'Nausicaä of the Valley of the Wind' could be a good choice. The protagonist, Nausicaä, is a very strong girl who faces many challenges with courage and wisdom. The manga has a deep story and beautiful art.
Well, it could be a shonen manga where the girl overcomes challenges with her super strength. Or a slice-of-life manga that shows how her strength affects her daily life. Maybe even a superhero-themed manga where she uses her power to save the world.
It could be a fantasy manga where the girl has magical powers and uses them to fight evil. Or maybe it's a sports manga where she excels in a tough sport.
It might be a fantasy manga where the kind and sweet girl has magical powers and uses them to help others. Or it could be a slice-of-life manga that showcases her daily life and the kindness she spreads around.
Maybe it's a post-apocalyptic manga where the girl has to fight to survive in a harsh world. Or perhaps a sci-fi one where she uses advanced technology to fight.