Code point
U+3191
Glyph appearance depends on your fonts.
U+3191
SoU+3191 IDEOGRAPHIC ANNOTATION REVERSE MARK is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Kanbun block.
Choose the representation you need, then copy its value.
U+3191
12689
㆑
㆑
E3 86 91
3191
00003191
%E3%86%91
\u3191
\u3191
\u3191
\3191