High Surrogates Unicode Block

High Surrogates is a reserved range of values used in the UTF-16 encoding scheme to represent characters from the supplementary planes, meaning those beyond the basic multilingual set. These values never appear alone in valid text; instead, each one pairs with a following low surrogate to form a single code point for a character like an emoji or a rare historical script. The range itself holds no assigned characters, acting purely as a technical placeholder for encoding, and its use is strictly controlled to prevent invalid sequences.