Thread:TheDigger1/@comment-27109830-20170508220452/@comment-26220697-20170514195438

Well, they're both the main friendly rival-type characters of the blue-haired surrogate older siblings to the main characters. While they originally started with a strong dislike of them, they began warming up over time, and eventually became some of the closest friends of the main heroes. Both are hot-blooded, a little arrogant, and have a hard time excepting the main characters as their superiors at first, though they do get over it. They're both pretty skilled mecha pilots as well, wielding powerful custom versions of the standard mecha, the King Kittan and Sizzler Black respectively, that mainly wield polearms as their main weapons, though they're nowhere near as tough as the machines used by the main heroes. They also shared a love interest with the character they were rivals with, with Kittan and Kamina both having been Yoko's love interest at some point, and Jung and Kazumi both being in love with Coach Oota. Both also were briefly pilots of the titular mecha of their series, with Kittan briefly being Gurren's pilot after Kamina's death, before handing the position to Rossiu, and Jung briefly piloting Buster Machine 2 after Kazumi returned to Earth, only to give the position back once she came back to space.