DragonBall Z: Coola, son of Frieza

after ten years of looking all over the universe, Coola, son of Frieza, has found the homeworld of the Super Saiyan that killed his father, and plans to get his revenge, but later on in the story, he'll find out that his sister, Chilla, has fallen in love with one of them. what will he do?

Coola is the main villain of the story, he'll do anything to get his revenge, Chilla is his twin sister, and while he cares for her, he would see her dead then to see her with a Saiyan she appears later in the story, Gohan is the hero of the story and is in love with Chilla, he'll appear later in the story, Salza is Coola's second in command and is loyal to him.

in the DragonBall universe