Pisces, the fish, was actually surprisingly easy to do; despite how alien she looks.

The next story that I've got in my head that's been induced by a dream revolves around the Zodiac animals, and each one gives their owner special abilities. Pisces gives their owner superior movement in water and the ability to breathe underwater.
Most Zodiacs are common, Pisces is no exception, and each comes in a different, unique form that suits their owner best.

Additional: Those are GILLS on the front of her throat; they'd work best if they actually followed her windpipe, hm?