It is a mecha anime. I believe 4 or 5 robots combine into 1 giant robot. There are 2 male and 3 female pilots. one of the guys, the red head, sister has disappeared. the head of the team is this guy that gives these grand speeches about everything... it is hinted in the story that hes either immortal or a time traveler because some people found a few paintings with his likeness throughout history. Also there were 2 seasons that I know of. Had a friend suggest Aquarion but this came out before Aquarion did.
Anyway I have been wracking my brain and I cannot remember and help would be awesome... thanks.