Low Surrogate-Dc46

Low Surrogate-Dc46 at U+DC46 is a non-printing surrogate code point used only as the second half of a UTF-16 surrogate pair, not as an independent character. It is assigned to the Low Surrogates block and has no letter, symbol, punctuation, or whitespace meaning on its own. In real text processing, this value can appear inside UTF-16 data when it follows a matching high surrogate to encode a supplementary Unicode character outside the Basic Multilingual Plane. Software that indexes strings by 16-bit code units, such as many older APIs and some programming-language internals, may expose it as one unit of a larger character rather than something a person typed intentionally. By itself, U+DC46 is ill-formed Unicode data. If it is isolated through truncation, faulty slicing, broken decoding, or database corruption, applications may reject the text, replace it with an error marker, or fail to match and search it as expected. The main practical concern is to avoid splitting surrogate pairs when measuring, editing, or limiting text stored in UTF-16.