Sonído is a technique developed by Hollows that allows them to move at incredible speeds, exceeding even the Flash Step. The difference lies in how they achieve this speed:
* Flash korak: Utilizes the manipulation of spiritual pressure to create a temporary "void" around the user, allowing them to move through it.
* Sonído: Employs the Hollow's own energy to distort the surrounding space, creating a "wave" that carries the user forward at high speeds.
So, while the result is similar (rapid movement), the underlying mechanics of the techniques are different.