SQUARE WITH UPPER LEFT DIAGONAL HALF BLACK U+25E9

BlockGeometric Shapes
CategoryOther Symbol
UTF-80xE2 0x97 0xA9
UTF-160xFF 0xFE 0xE9 0x25
UTF-320xFF 0xFE 0x0 0x0 0xE9 0x25 0x0 0x0
HTML◩
Pythonu"\u25E9"