"Light, water and earth."
Ophelia is a fictional character in the anime series, Romeo x Juliet. Early in the series, it was revealed that she is the caretaker of a tree called Escalus which has magical powers of some sort. It does not live by only light, water and earth like normal trees; it needs love and harmony among people, however lame that may sound (not the love and harmony part- which I fully endorse).
I presume that Lord Montague (Laertes) hired her because he doesn't have any skills other than looking scary. Their relationship is rather interesting; despite the fact Laertes is the lord of Neo Verona, Ophelia can say "Please don't tell me what to do." and get away with it (unlike Romeo, who would get a slap). This proves that she is important, and perhaps the only one that can take care of Escalus which somehow ensures his prosperity. It has been confirmed that Escalus does indeed have something to do with Montague's success as well as keeping Neo Verona in the air. What that "something" is, I'm not sure.. Further developements have been made on Escalus' role to the whole story; turns out, it had a twin tree who helped support Neo Verona, but it died and now Escalus is the only thing that's keeping the continent afloat. Therefore, if Escalus died as well, the whole place goes down with it. Ophelia's job is to make sure that doesn't happen.
Romeo x Juliet, the anime was adapted from William Shakepeare's play which was adapted from another play and so on. His version of the story is simply the most famous, not the original. It follows the tale of two lovers, Romeo and Juliet who seem to be plagued by problem after problem until it becomes too much and results in their suicides. There's a Sasuke clone in there too. *coughTybaltcough*. Also, there are a number of very significant differences between the play and this anime- the whole plot, for instance. They are quite noticable, if you still follow the series (I think it sort of died after episode 11).
About this layout : All I can say is that it's quite a refreshing change from it's hideous predecessor.