Personality:Cooler's personality is quite similar to that of his younger brother and his father, though with a few noticeable differences. Like Frieza, Cooler handles problems in an intellectual and serious manner. Though unlike his brother, Cooler is less likely to underestimate his opponents, as seen when he acknowledged that Goku was still alive despite taking a direct hit from his attack, and thus ordered his subordinates to search for and kill him. Even when they had demolished a large portion of the surrounding environment with continuous barrages of energy blasts, he did insist that they continued their pursuit. Cooler is also apparently somewhat more positively inclined towards his subordinates than his brother and father, as he has never once been seen abusing, ridiculing, executing them or anything of the sort; and even offer to take on opponents whom outmatch them personally, which likely contributes to their undivided loyalty and respect to him.
History:Like the rest of his family, Cooler is shown to be involved in the Planet trade organization, although he does not appear to work closely with his family. He also leads his own squadron of warriors. In the year Age 737, while Frieza destroyed Planet Vegeta, the home planet of the Saiyans, a newly-born Kakarot (Goku) was being sent to subjugate Earth. Seeing that Goku had escaped the explosion, Cooler's henchmen made plans to shoot the space-pod down. Cooler unexpectedly delayed the order, lamenting that his brother was still far too soft to allow a child's escape, and that Frieza's conceit would delay the annihilation of the Saiyan race and jeopardize his family's absolute control over the galaxy (that, and also the fact that he had seven planets to conquer/destroy by the end of the day [depending on the version], thus making him too busy to carry out the order anyways). Also, as Goku was only an infant at the time, he didn't believe him to be any sort of immediate threat.
Roughly 27 years later, Cooler is given word that his brother had been killed by a Saiyan. Initially skeptical, he soon comes to believe it, and heads to Earth to avenge Frieza's death; however, he has no compassion for his brother and only desires to do so to restore his family's honor. Upon arriving, he makes his henchmen encounter a Saiyan, who of course is Goku. He succeeds in mortally wounding him in a shot intended for Gohan, but loses sight of his quarry after Goku is washed down a waterfall. This encounter leads Cooler to suspect that the reason why Goku was able to seemingly kill Frieza was because he was a Super Saiyan. Not content to blow up the planet, being too proud and eager to smite the one who injured his family name, Cooler goes to some lengths to have him tracked down.
With his henchmen Doore and Neiz killed by Piccolo and Salza almost defeated by him, Cooler finally enters the battle himself, with Piccolo expressing shock, believing him to be Frieza and stating that he should be dead. Cooler easily defeats Piccolo, blasting him in the chest multiple times and has Salza go after Gohan. Goku, revived by consuming a Senzu Bean, encounters Cooler, and Cooler demonstrates how much mercy he lacks, by dropping Piccolo, pretending to let Piccolo go for Goku to rescue him, and then blasting Piccolo before Goku could catch him. Goku, enraged, begins his battle with Cooler. Initially, he and Cooler are a fairly even match (too much even for Cooler's tastes), so he honors Goku by showing him his ultimate transformation. He increases dramatically in size, speed, and strength; four horns grow to form a crown atop his head as spikes form on his forearms, and he now sports a face-mask of sorts, hiding all facial features except his eyes, which are now red without pupils.
Strength:In Cooler's Revenge, it was shown that Cooler was near evenly matched with Goku in his base form. However, one interesting fact is that base Goku (after he received a zenkai during the events of the movie) had become so powerful that Cooler states, after battling him that, Goku is powerful "enough to have defeated Frieza". Cooler then transformed into his Final Form where he far outclassed Goku even when Goku went into Kaio-ken x20, and lost only when Goku transformed into a Super Saiyan who dominated him and blasted him into the sun. However, Cooler was saved and rebuilt by the Big Gete Star after his battle against Goku.
After receiving his robotic upgrades, Cooler's power increased dramatically. His robotic form, capable of adapting and improving with the tactical computer of the Big Gete Star, was enough to last a while in a fight against Super Saiyan Goku and allowed him to create an army of robotic duplicates. The sheer number of stronger Metal-Coolers were enough to overwhelm both Goku and Vegeta.
Cooler revealed to Goku before his final transformation that Frieza was always trying to beat him at everything and that he would have killed him sooner had it not been for his father. This implies that Cooler was planning on killing Frieza before his confrontation with Goku, and desired to kill Goku mostly for robbing him of his chance of doing so rather than family matters.
Power Level:Cooler has a power level of 470,000,000.
List of Techniques:
Afterimage – A move he used in Dragon Ball Z: Budokai Tenkaichi 3.
Arc Blast – Cooler transforms into his final form and releases an Arc(tic) Blast, or a lot of sharp little blasts. It is his Ultimate K.O. in the Nintendo DS game Dragon Ball Z: Supersonic Warriors 2.
Death Ball – A spark of ki that may grow to the size of a small moon.
Supernova – In his final form, Cooler has the ability to gather tons of ki in seconds to create the supernova. This was to be Cooler's trump card versus Goku, but his attack is blocked and he is subsequently pushed by the force of it and Goku's Kamehameha into the sun.
Death Beam – Like most members of the Cold Family, Cooler has mastered the Death Beam, as seen in Budokai Tenkaichi 3.
Chaotic Dead End – A variation of the Death Beam used on Piccolo.
Death Chaser – In final form, Cooler punches the opponent in the stomach, followed by a knee and a back-punch, knocking the opponent to the ground. Then, Cooler kicks the opponent in the stomach. Used against Goku.