Okay, since Nina ([link]) is a watergodess, the more people who believes in her the more powers she gets. (Also, her original form pretty lame so I decided to change it.)
(Why yes, lame ass coloring and no hands )

Original form - this form Nina has for about 100 years. It can be compared with ones childhood; she doesn't know very much about herself and the world and she spends most of her time training and travelling the world.

Middle form - this form Nina has most of her life (it's also my favorit form ). This is where the real battle against evil begins, but she still doesn't have all her powers. In this form she has wings, similar to the ones flying-fishes has; she can't really fly with them but she can jump really far.

Final form - in the middle of the final battle against evil Nina transforms into this form, and she keeps it after defeating evil when she ascends to the heavens. She has real wings now, and a long skirt; she won't be doing much fighting in this outfit!

okay, that about sums it up!