Yep, Waver grows into a huge badass Teacher (Rin's Teacher!) that pretty much as sworms of women wanting to have his kid. Pitty the Grail War made him a large cynic at the same time though

Um spoiler that post please some people don't even know fate and are just watching fate/zero and getting into it.

You really shouldn't watch a prequel first, Zero majorly spoils a lot of plot twists in Fate, it also generally assumes you are already familiar with the series.

I'm speaking in behalf of those people i know who just watch the show and don't have the time to play the game or watch the fate/stay night anime. I know that already as I have played the games three routes and am informed of such spoilers.