Non Private Use High Surrogate-Db75

Non Private Use High Surrogate-Db75 at U+DB75 is a high-surrogate code point, not a complete character with its own visible meaning. It is assigned to the High Surrogates block and exists only as part of UTF-16’s mechanism for representing supplementary Unicode characters beyond the Basic Multilingual Plane. In well-formed UTF-16 text, this code unit must be followed by a matching low surrogate to encode a single character such as an emoji, historic script letter, musical symbol, or other non-BMP character. By itself it is an unpaired surrogate, so text systems should not treat it as a printable symbol, a letter, punctuation, or whitespace. It most often matters in software engineering, data validation, fonts, databases, and text-processing tools that inspect or repair Unicode strings. A lone high surrogate like this can appear after broken truncation, incorrect indexing by 16-bit code units, malformed input, or encoding conversion errors; the practical gotcha is that it may cause replacement characters, rejected strings, failed serialization, or mismatched search results unless paired and handled correctly.