Update!
Sooo, as far as a Defender using /Water ... I ended up with Poison/Water, heh.
Something just clicked when I started playing around in the character creator, and I have a hero who is a Perfumer by trade, and a Hero. 😄 Tinted the powers to make them pretty, delicate, and fairly subtle ... and her stick is that she just throws perfume at things.
Whether or not she'll be effective at all, I have no clue 😄