Cascade

Cascade's list of powers
Complete Hydrokinesis: Able to Manipulate any and all water
Fragmented Avatar: Snapping of their regeneratable ice, Cascade is able to shape this material to form a smaller body that connects to her mind and acts with her will.

Headcanons
-Cascade's Empyrian consists primarily of a near infinite stretch of shorelines, glaciers, springs, and rock formations bordering an incomprehensibly large ocean or lake. There are various sculptures and examples of craftsmanship all across these boundaries that utilise the power of the wind and the waves themselves to make various forms of musical efforts, being based on their power or frequency.
--The most vital of these is considered the Central Shore, a series of large springs that house many occupants, as well as the throne of Cascade, overlooking her domain.
-The various forms of water that her form carries is well documented as having varying levels of magical potential, such as containing powerful healing magics while staying nearly perfectly clean.
-Instruments similar to the "Cascachord" are frequently wielded by her followers, using various pumps or other flows of water to achieve similar results with them-sized versions.
-Most of Cascade's body is Hydrophobic, meaning fluids typically flow right off her, leaving her skin surprisingly dry after being submerged.