Cooler

クウラ

Cooler serves as the primary antagonist in the fifth and sixth Dragon Ball Z films, introduced as Freeza's older brother and King Cold's eldest son. Akira Toriyama, the original manga creator, designed the character for Toei Doga's theatrical release. Similar to his sibling, he can push his body through transformations to boost his power. Although only two forms are shown, the fifth film states that Coola possesses the same number of forms as Freeza, including a fifth and more powerful one.
He first travels to Earth in Cooler's Revenge to kill Goku, the Saiyan who fought his brother. He ends up battling Goku in his final form. Upon transforming, he grows dramatically in size, speed, and strength; four horns develop into a crown atop his head, spikes form on his forearms, and he sports a facemask that hides all facial features except his eyes, which are now red and pupil-less. Ultimately, Super Saiyan Goku sends him hurtling into the Sun. Some of his remains merge with the Big Gete Star, allowing him to take control of it and create an indefinite number of mechanical clones that can constantly repair and improve themselves. Capable beyond his organic self, these Metal Coolas are a match for two Super Saiyans and retain the ability of Shunkan Ido ("Instantaneous Movement"). Coola uses his newfound resources in an attempt to absorb New Namek in Return of Cooler, but Goku and Vegeta destroy both him and the star in the end.
He later makes cameo appearances in Dragonball Z: Fusion Reborn and Dragon Ball GT, when all villains escape from Hell. A phantom Coola, along with what appears to be a resurrected Freeza, Tullece, and Lord Slug, attacked Goku and his friends in the Famicom game (and later Playdia re-make) Gaiden: Saiya-jin Zetsumetsu Keikaku (Side Story: The Plan to Eradicate the Saiyans) (an OVA was also released on VHS in August 1993), but these are merely false ghost-warriors meant to harass the heroes.