In some storylines, Frieza shows moments of potential redemption, but it's not a straightforward 'becoming good'.
Black Frieza appears in the Dragon Ball Super manga.
No, Dabi doesn't become good. His character remains firmly on the villainous side throughout the manga.
Frieza's victims in the manga included many powerful fighters. For instance, he eliminated Dende. His actions were driven by his cruel and power-hungry nature.
The goodness of One Piece manga is subjective. But generally, it starts to shine when the characters' backstories and the world-building deepen. Arcs like the Marineford arc are where a lot of people really get hooked.
Yes, Tanjiro eventually becomes a Hashira in the manga after going through many challenging battles and growth.
Yes, Ciel does become a demon in the manga.
No, Deku doesn't become a villain. He remains a hero throughout the manga, fighting for justice and protecting others.
Yes, Naruto does become Hokage in the manga. It's a major plot point and a fulfilling achievement for his character.
Inosuke doesn't become a Hashira in the manga. The story progresses with him having other significant experiences and achievements instead of achieving that specific position.
Sure, Deku takes on the role of a vigilante in the manga. It's a bold move that showcases his growth and the challenges he faces outside the conventional system of heroes.