Theatre Plaisir (テアトル・プレジール?) is a theater constructed from mana, a cinematheque that collects all of the films Rider recorded during her lifetime. When asked how it is useful, Rider states "each one of them has the potential to move many millions of people."
Used offensively, Rider emulates Cinema Paradiso by summoning the film reels, spreading the films strips, and then lighting them on fire to incinerate the enemy. The theater itself can also become an "inglorious execution grounds" to trap her enemies inside while burning it down. When used in Chaldea Security Organization, it's enough to completely burn it down, Rider and the others only surviving due to the usage of Lord Camelot and Luminosité Eternelle.