U+115B1 "𑖱" Siddham Vowel Sign Ii Unicode Character

U+115B1 "𑖱" Siddham Vowel Sign Ii is a combining vowel mark used in the Siddham script, a historical abugida primarily employed for writing Buddhist texts in East Asia, especially in Japan and China. This specific character represents the long vowel sound "ii" and is placed as a diacritic above or attached to a consonant character to modify its inherent vowel, extending the pronunciation of the syllable. Siddham is no longer a spoken language but remains significant in esoteric Buddhist ritual contexts and calligraphy, where this vowel sign helps preserve the phonetic nuances of sacred Sanskrit and Indian chants.