Holographic Walls are Riku's signature mechanic - a Limited Secret style that creates shimmering, semi-transparent walls on both sides of the court whenever you spike or serve. These walls aren't visual flair: they physically interact with the ball, redirecting it unpredictably off angles that defy standard volleyball physics. Unlike tilting or curve mechanics, Holo Walls operate automatically - no input required beyond executing a clean spike or serve. Their behavior is consistent but context-sensitive: wall placement depends on your position, jump height, and ball trajectory at impact. This guide gives you concrete, tested steps to control, anticipate, and weaponize them - not just survive them.