U+1859 "ᡙ" Mongolian Letter Todo Haa Unicode Character

U+1859 "ᡙ" Mongolian Letter Todo Haa is a glyph used in the Todo script, a variant of the traditional Mongolian alphabet historically employed by the Oirat and Kalmyk peoples for writing their languages. This specific letter represents the aspirated voiceless velar plosive sound "h" (or a similar guttural sound), distinct from the standard Mongolian "H" form, and it appears in the Unicode block for Mongolian letters to support accurate digital rendering of Todo script texts, including historical documents and modern language preservation efforts.