Who Am I?

[Manardariel]

Hang on.... is it my turn?? I´m confuddled...
because aragornreborn said

In any case, Manardariel has it. It was Arwen.

and now you guys are still guessing around... anyways. I´ll post a riddle´, ok?

The made me popular
and pretty
but did they catch my self?
Watcher am I
born with a keen eye
and water is my doom

It´s pretty complex, but I suppose solvable...