Code point
U+1F142
Glyph appearance depends on your fonts.
U+1F142
So<square> 0053U+1F142 SQUARED LATIN CAPITAL LETTER S is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Enclosed Alphanumeric Supplement block.
Choose the representation you need, then copy its value.
U+1F142
127298
🅂
🅂
F0 9F 85 82
D83C DD42
0001F142
%F0%9F%85%82
\U0001F142
\u{1F142}
\uD83C\uDD42
\1F142