U+115B3 "𑖳" Siddham Vowel Sign Uu Unicode Character

U+115B3 "𑖳" Siddham Vowel Sign Uu is a combining diacritical mark used in the Siddham script, an ancient writing system historically employed in East Asia for writing Buddhist texts and mantras, particularly in Japan, where it is known as Shittan or Bonji. This character modifies a consonant to denote the long vowel sound "uu," similar to the English "oo" in "boot," and is applied as a visually distinctive horizontal curved stroke above the consonant letter, reflecting the script’s ornate and calligraphic style. Its inclusion in Unicode preserves a vital component of this historical script, enabling accurate digital representation of Siddham manuscripts and religious documentation.