Negative Squared Downwards Arrow (U+1F8B7) is a Unicode other symbol from the Supplemental Arrows-C block. It resides on Plane 1 (SMP, Supplementary Multilingual Plane), has bidirectional class ON (other neutrals), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as 🢷 or 🢷. Because it is outside the Basic Multilingual Plane, proper font support is required; otherwise a fallback box may be shown.