U+03F9 "Ϲ" Greek Capital Lunate Sigma Symbol Unicode Character

U+03F9 "Ϲ" Greek Capital Lunate Sigma Symbol is a variant form of the Greek letter sigma that resembles the Latin letter C rather than the standard Σ shape, used primarily in ancient and medieval Greek manuscripts where the sigma was written in a lunar or crescent form. This character is distinct from the lunate sigma's lowercase counterpart and serves as a capital letter in contexts requiring uppercase representation, such as in inscriptions, papyri, or scholarly editions of Greek texts. It belongs to the Greek and Coptic block in Unicode and is sometimes employed in modern typography for historical or stylistic purposes, though it is not a standard letter in contemporary Greek writing.