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.
Frieza killed quite a few characters. Among them were Vegeta's father, King Vegeta. This act added to the enmity between Vegeta and Frieza.
No, Trigger did not create the Kill la Kill manga. The manga was created by someone else.
In some storylines, Frieza shows moments of potential redemption, but it's not a straightforward 'becoming good'.
In the manga, Guts was not the one who ended Griffith's life. The storylines and conflicts are much more complex than that.
Sukuna didn't manage to kill Gojo. The storylines and battles unfolded in a way that Gojo remained alive and intact in the manga.
Yes, she did. Misa's fate in the manga ended with her taking her own life.
Sailor Moon doesn't engage in killing throughout the manga. Her power is used to protect and transform evil, not to cause fatal harm. The focus is on her positive influence and the battles against darkness without resorting to lethal means.
Yes, Naruto did kill a snake at some point in the manga.
Black Frieza appears in the Dragon Ball Super manga.
In the manga, Goku managed to kill Zamasu by combining his strength with Vegeta and performing a joint attack. They also exploited Zamasu's weaknesses to gain the upper hand.