Code point
U+303F
Glyph appearance depends on your fonts.
U+303F
SoU+303F IDEOGRAPHIC HALF FILL SPACE is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the CJK Symbols and Punctuation block.
Choose the representation you need, then copy its value.
U+303F
12351
〿
〿
E3 80 BF
303F
0000303F
%E3%80%BF
\u303F
\u303F
\u303F
\303F