|Unicode name||ROMAN NUMERAL NINE|
Alternative forms 
Ⅸ (upper case Roman numeral nine, lower case ⅸ)
Usage notes 
This symbol is the pre-combined Unicode glyph for the Roman numeral nine, mainly intended for compatibility with large East-Asian character sets. It is used to represent the individual number where individual glyphs are not wanted. Otherwise, the Roman numeral nine is written as the sequence “IX” (that is, “I” followed by “X”).