I'm assuming history doesn't have to match canon exactly. If it does I'll edit this.
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Name: [url=http://powerrangers.wikia.com/wiki/Mike_Corbett]Mike Corbett[/url]
Previous Ranger Title: [url=http://powerrangers.wikia.com/wiki/Magna_Defender]Magna Defender[/url]
Current Ranger Title: Black Multiverse Ranger
Brief History:  The brother of the Red Galaxy Ranger, Mike was attacked before he could try to pull out the Red Quasar Saber. Instead his younger brother pulled out the legendary blade. Determined to find a way to help Leo and the other Galaxy Rangers, he eventually found the Magna Blaster. Unfortunately by picking up the the gun/sword he allowed the spirit of the original Magna Defender to posses him. Until the vengeful ghost finally destroyed the monster responsible for killing his son Mike was basically a backseat passenger in his own body, forced to watch as the spirit treated the Rangers barely any better than his real enemies. When he finally regained control he joined up with his younger brother and helped defend Terra Ventura until he gave up his powers.