Code point
U+25EE
Glyph appearance depends on your fonts.
U+25EE
SoU+25EE UP-POINTING TRIANGLE WITH RIGHT HALF BLACK is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Geometric Shapes block.
Choose the representation you need, then copy its value.
U+25EE
9710
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◮
E2 97 AE
25EE
000025EE
%E2%97%AE
\u25EE
\u25EE
\u25EE
\25EE