U+25A8 "▨" Square with Upper Right to Lower Left Fill Unicode Character

U+25A8 "▨" Square with Upper Right to Lower Left Fill is a geometric symbol representing a square that is partially filled along a diagonal line running from its upper right corner down to its lower left corner. This creates a distinct pattern where the upper right half of the square is filled, while the lower left half remains empty, offering a visual contrast that can be used in technical diagrams, data visualization, or text-based user interfaces to indicate a specific state, proportion, or directional flow. Its clean, binary division makes it useful for representing partial completeness, directional shading, or as a decorative element in typesetting and coding environments.