This character is a Other Letter and is mainly used in the Duployan shorthand 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+1BC3E forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
The Duployan shorthand, or Duployan stenography (French: Sténographie Duployé), was created by Father Émile Duployé in 1860 for writing French. Since then, it has been expanded and adapted for writing English, German, Spanish, Romanian, Latin, Danish, and Chinook Jargon. The Duployan stenography is classified as a geometric, alphabetic stenography and is written left-to-right in connected stenographic style. The Duployan shorthands, including Chinook writing, Pernin's Universal Phonography, Perrault's English Shorthand, the Sloan-Duployan Modern Shorthand, and Romanian stenography, were included as a single script in version 7.0 of the Unicode Standard / ISO 10646
Representations
System
Representation (click value to copy)
Nº
113726
UTF-8
F0 9B B0 BE
UTF-16
D8 2F DC 3E
UTF-32
00 01 BC 3E
URL-Quoted
%F0%9B%B0%BE
HTML hex reference
𛰾
Wrong windows-1252 Mojibake
ð›°¾
Encoding: GB18030 (hex bytes)
93 38 A0 30
RFC 5137
\u'1BC3E'
Bash and Zsh inside echo -e
\U0001BC3E
C and C++
\U0001BC3E
C#
\U0001BC3E
CSS
\01BC3E
Excel
=UNICHAR(113726)
Go
\U0001BC3E
JavaScript
\uD82F\uDC3E
Modern JavaScript since ES6
\u{1bc3e}
JSON
\uD82F\uDC3E
Java
\uD82F\uDC3E
Lua
\u{1BC3E}
Matlab
char(113726)
Perl
"\x{1BC3E}"
PHP
\u{1bc3e}
PostgreSQL
U&'\+01BC3E'
PowerShell
`u{1BC3E}
Python
\U0001BC3E
Ruby
\u{1bc3e}
Rust
\u{1bc3e}
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