General Category - Titlecase Letter
Titlecase Letter is a classification for characters that appear as the first letter of a word when that word is written in a special typographic style, most notably in digraphs or ligatures. These characters combine an uppercase form for the initial letter with a lowercase form for the subsequent letter, creating a single visual unit that acts as a capital. A common example is the Croatian and Serbian digraph Dž, which is distinct from its all-uppercase DŽ and all-lowercase dž counterparts. This category exists to preserve the precise casing distinction needed for correct rendering and sorting in certain languages, ensuring that such combined characters are treated as a single, title-cased entity rather than being decomposed into separate uppercase and lowercase parts.