Seventy five

First appearance
Seventy Five is a minor villain in MuTk Invasion, he was first seen fighting against MuTk in MuTk Invasion part 3 1 out of 4. When he attacks MuTk, MuTk is confused on why he attacked him, but Seventy Five responded by saying "No questions only death." MuTk then proceeds to transform, and combats Omega Seventy Five, fighting pretty evenly, although eventually Omega Seventy Five uses his 500% Omega Form, also known as Ultra Rage these days. And he gets blasted by MuTk, and calls MuTk stupid for thinking he can rule the universe. MuTk then says he won't be hiding this and powers up and absorbing 5 Human Souls, and states that he is 10 times stronger than Seventy Five and blasts Seventy Five seemly killing him. Although the next episode he is revealed to be alive, and meets Ditto, they decide to team up to destroy MuTk, but they encounter Doxic and the heroes, and Seventy Five says that he wants a truce, because he wants to kill MuTk as well. They then warp away and see the fight with Sqeegee and the other heroes. Although in the next episode, Seventy Five agrees with Ditto that they've had enough of being evil, and decide to join the the heroes, Seventy Five becomes Star-E once again, Star-C even says "Welcome back old friend." and he says that Star-C and Star-D should fuse into Star-X to have a higher chance of winning, he then helps the heroes to defeat MuTk in in the final episode of MuTk Invasion, and they successfully kill MuTk.

Season 2
Seventy Five doesn't appear in the first episode of season 2, but an alternate version, Fifty Seven is resurrected by Normad, but overall he doesn't appear as much as he used to.

Abilities and appearance
Seventy Five is a creation made by Xamo, after Xamo tried to remake Type-One 74 more times, that is how he got his name. Seventy Five is naturally very powerful, and because he is a creation of Xamo he has the ultra rage ability, by default, although he didn't discover it until the final EU episode, the ultra rage ability was originally called "500% form" as well. Seventy Five also has a ton of forms, possibly the most in the whole series. He can also use his head literally to attack enemies, but he grows arms in his other forms, he also has the basic ability to fire beams at his enemies as well. And potentially its possible for him to fuse with Star-X because he was Star-E once before, and he is now, as he rejoined the Star Force.