I've read a sm/rw crossover where Sailor Moon meets her father and it's....The Ancient. Well, I guess we know who her father is! ^_^ I also saw on Pretty Ronin Sailor Moon (http://www.geocities.com/TimesSquare/Ring/4563/ronin/senshi.html)that the Ancient and Queen Serenity make a cute couple.
It makes sense when you think about it. Both of them fought a very bad, powerful evil menance at the same time: 1000 years ago. So when The Ancient One killed Talpa and made the armors, Queen Serenty was fighting Queen Beryl. Only, Queen Serenity (and everyone else) died. I wish I saw Queen Serenity kick the sh*t out of Queen Beryl though!

They are the ones who started it all. Queen Serenity gave the scouts their transformation sticks, (actually, Luna did, but Queen Serenity sent Luna down to Serena, so technically, Queenie started it.)

The Ancient One made the armors after defeating Talpa. He really kicked the sh*t out of him! (Well, I wish I saw a little bit more action though.)

Though you don't see them much in the series (which makes me mad!), they help out a lot. Even after they are dead. Ryo and the others still hear the Ancient speak to them time to time and Queen Serenity talks to Serenity too. And the Ancient saved Anubis. That's one of the reasons why I think The Ancient is so awesome! He saved my fave warlord!!!

I wouldn't doubt if the Ancient and Queen Serenity are even more powerful than the ronins or the sailors combined. I mean, they were the ones who got the whole thing started, didn't they? Two spirits with a ton of power...I think they make a great couple, don't you? I mean, just think about it man...