Ku style is Yang style as taught by Ku Yu Cheung a famous Iron Palm practitioner.
Ku style Tai Chi does exist, as well as Wu style; and many other styles of Tai Chi. Katara studies Ku style/Yang form Tai Chi, Sun style Tai Chi, and Bikram Yoga.
Ku style /Yang form Tai Chi.
The uniform color for Ku style/Yang style Tai Chi is black shirt and pants with black buttons. There are other colors for Tai Chi/Wushu uniforms, but those are other styles. Tai Chi is a style or type of Wushu. To tell you the truth, I really don't know what color the uniform is for Ku-style Tai Chi. I'm thinking it's Sky Blue or Light Blue, but I'm not really sure.
Ku style Tai Chi is taught in Richmond, WA, USA. This style is not largely known outside of China.
It's Wutan Tai Chi. It says Bath Tai Chi because this style is taught in Bath, UK.
Yes, Waterbending Tai Chi or Ku style Tai Chi will help you overcome your fears and phobias.
It was made up, so you aren't going to find serious sites on it. "Waterbending" is fictional, BUT the real-world martial art that is the basis for "Waterbending" isn't. "Waterbending" is based off of Ku-style Tai Chi. Ku-style Tai Chi is passed down from the Ku Yu Cheong lineage.
The style is Ku style/Yang form, Sun style Tai Chi, and Yoga. There is one website for Ku style and a few websites for Sun style. There are several websites for Yoga.
All Tai Chi styles have the same essential foundations, and have the same aims or goals for betterment of life and martial ability. They differ in how they execute these foundations. Ku style is also (primarily) known as Guang Ping Yang style which is hard to find in the US. It would definitely be worth learning any style of Tai Chi until you can find someone teaching Guang Ping Yang.
I know ... not. AS Katara is not real this is an example of a hypothetical question. The answer depends on who is answering.
If you learn Ku style Tai Chi (Yang style). This is a form of bending the water to your own will. Ku style Tai Chi is also known as "Waterbending."
She probably learned while on the set of the movie.