Series identification late 90 early 2000's

Question

I am looking for a cartoon/anime series.

Its a post-apocalyptic world and 3 guys travel with the last human. One of the guys, who is more of a boy, can transform into a man with a red hawk/eagle armor. One of the other guys can do things with water.

At some point the 3 transform together with a special sword in 1 guy to beat the big enemy

Answer 1

Could this be Shinzo (AKA Mushrambo)?

The protagonist is described as the last human, he has three adult protectors helping him to cross a post-apocalyptic wasteland, one of the characters turns into a sort of hawk-dude with red armour, another has water skills.