U+A857 "ꡗ" Phags-Pa Letter Ya Unicode Character

U+A857 "ꡗ" Phags-Pa Letter Ya is a distinctive glyph from the Phags-Pa script, which was created in the 13th century during the Yuan Dynasty in China to write Mongolian, Chinese, and other languages uniformly. This specific character represents the sound "ya" and is used as a consonant or semivowel in the orthography. The Phags-Pa script itself is historically significant as a rare example of a vertical writing system that influenced later developments in East Asian script design, though its use largely declined after the fall of the Yuan Dynasty.