This character is a Other Letter 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 is written from left to right. When changing direction it is not mirrored. The word that U+191A forms with similar adjacent characters prevents a line break inside 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
6426
UTF-8
E1 A4 9A
UTF-16
19 1A
UTF-32
00 00 19 1A
URL-Quoted
%E1%A4%9A
HTML hex reference
ᤚ
Wrong windows-1252 Mojibake
ᤚ
Encoding: GB18030 (hex bytes)
81 34 EF 30
RFC 5137
\u'191A'
Bash and Zsh inside echo -e
\u191A
C and C++
\u191A
C#
\u191A
CSS
\00191A
Excel
=UNICHAR(6426)
Go
\u191A
JavaScript
\u191A
Modern JavaScript since ES6
\u{191a}
JSON
\u191A
Java
\u191A
Lua
\u{191A}
Matlab
char(6426)
Perl
"\x{191A}"
PHP
\u{191a}
PostgreSQL
U&'\191A'
PowerShell
`u{191A}
Python
\u191A
Ruby
\u{191a}
Rust
\u{191a}
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