U+A851 "ꡑ" Phags-Pa Letter Tsha Unicode Character

U+A851 "ꡑ" Phags-Pa Letter Tsha is a specific glyph from the Phags-pa script, an alphabet created in the 13th century by the Tibetan monk Drogön Chögyal Phagpa for the Yuan dynasty emperor Kublai Khan to write various languages, including Mongolian, Chinese, and Tibetan. This particular character represents the aspirated affricate sound /tsʰ/, akin to the "ts" in "cats" with an extra breath of air, and is part of a set of letters used to transcribe sounds from those languages, most notably in historical inscriptions and texts from that period.