Kogu Character Facts

Not much is known about Kogu except that he is a skilled swordsman. He is the same alien race as Bojack and his crew; he even has a transformation similar to Bojack's.
He waits in a field during the Intergalactic Martial Arts Tournament, posing as one of Mr. Satan's champions (whom he and the Galaxy Soldiers had murdered earlier). He encounters Future Trunks and ambushes with a Full Power Energy Ball fired from a tree he was sitting on. After Future Trunks scolds him for bringing a sword into the tournament, Kogu proceeds to attack him, catching Future Trunks by surprise, while also telling the latter that he is "not someone to be trifled with." He then transforms near a body of water, and further overwhelms Future Trunks with a series of brutal blows and clotheslines. A Future Trunks refused to surrender, Kogu tries to finish Future Trunks off, but ends up caught by surprise when Future Trunks turns Super Saiyan. In the end, Kogu ends up with a broken sword and is taken down by a fist clean through the stomach from Super Saiyan Future Trunks. Despite this, however, the fight has worn Future Trunks out enough to be easily ambushed and knocked out by Kogu's master, Bojack.
During Kogu's Race of Hera transformation displayed in Bojack Unbound, his skin turns from blue to green, his hair turns red, and his strength and power greatly increase.