Well, the name change was originally intended as a sort of protection... you know how in some of those magical system the big bad needs to know your 'Real Name' in order to have absolute control over you? Granted, it's usually something other than your birth-name, but why give them any more chances than they need?
As for the whole point of the story... Well, our main character would like nothing more than to settle down and start on a family... but the situation will be preventing that. And so, he'll have to compromise between getting what he actually wants - a family to care for and that cares for him in return - and having to let go of the people and places he cares about. (And of course, there's going to be a lot of explodey stuff along the way.)
Eventually, he will be brought back to Tenchiverse and be welcomed with open arms... but along the way, he's going to gather his own family. Of course, in fine Tenchi-verse fashion this is just keeping up with the neighbors.
EDIT: Oh, and let's not forget that this ROB is going to be getting the flying middle finger fairly early on. Garrick will view Tsunami as his patron Goddess. True, really, when she goes out of her way to make a few things happen for him... or at least Sasami does (you know that whole Sasami/Tsunami thing.) You know how she is about hard luck cases, and this one just about breaks her heart.
As for the whole point of the story... Well, our main character would like nothing more than to settle down and start on a family... but the situation will be preventing that. And so, he'll have to compromise between getting what he actually wants - a family to care for and that cares for him in return - and having to let go of the people and places he cares about. (And of course, there's going to be a lot of explodey stuff along the way.)
Eventually, he will be brought back to Tenchiverse and be welcomed with open arms... but along the way, he's going to gather his own family. Of course, in fine Tenchi-verse fashion this is just keeping up with the neighbors.
EDIT: Oh, and let's not forget that this ROB is going to be getting the flying middle finger fairly early on. Garrick will view Tsunami as his patron Goddess. True, really, when she goes out of her way to make a few things happen for him... or at least Sasami does (you know that whole Sasami/Tsunami thing.) You know how she is about hard luck cases, and this one just about breaks her heart.