This character is a Nonspacing Mark and is mainly used in the Limbu script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Nonspacing Mark. When changing direction it is not mirrored. U+193B prohibits a line break before it.
The Wikipedia has the following information about this codepoint:
The Limbu script (also Sirijanga script) is used to write the Limbu language. It is a Brahmic type abugida.
Representations
System
Representation (click value to copy)
Nº
6459
UTF-8
E1 A4 BB
UTF-16
19 3B
UTF-32
00 00 19 3B
URL-Quoted
%E1%A4%BB
HTML hex reference
᤻
Wrong windows-1252 Mojibake
◌᤻
Encoding: GB18030 (hex bytes)
81 34 F2 33
RFC 5137
\u'193B'
Bash and Zsh inside echo -e
\u193B
C and C++
\u193B
C#
\u193B
CSS
\00193B
Excel
=UNICHAR(6459)
Go
\u193B
JavaScript
\u193B
Modern JavaScript since ES6
\u{193b}
JSON
\u193B
Java
\u193B
Lua
\u{193B}
Matlab
char(6459)
Perl
"\x{193B}"
PHP
\u{193b}
PostgreSQL
U&'\193B'
PowerShell
`u{193B}
Python
\u193B
Ruby
\u{193b}
Rust
\u{193b}
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