This character is a Other Letter and is mainly used in the Ogham 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+1687 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Dair is the Irish name of the seventh letter of the Ogham alphabet, ᚇ, meaning "oak". The Old Irish: dair (Early Old Irish: daur) is related to Welsh derw(en) and to Breton derv(enn). Its Proto-Indo-European root was *dóru ("tree"), possibly a deadjectival noun of *deru-, *drew- ("hard, firm, strong, solid"). Its phonetic value is [d].
Dair forms the basis of some first names in Irish Gaelic such as Daire, Dara, Darragh and Daragh.
Representations
System
Representation (click value to copy)
Nº
5767
UTF-8
E1 9A 87
UTF-16
16 87
UTF-32
00 00 16 87
URL-Quoted
%E1%9A%87
HTML hex reference
ᚇ
Wrong windows-1252 Mojibake
ᚇ
Encoding: GB18030 (hex bytes)
81 34 AD 31
RFC 5137
\u'1687'
Bash and Zsh inside echo -e
\u1687
C and C++
\u1687
C#
\u1687
CSS
\001687
Excel
=UNICHAR(5767)
Go
\u1687
JavaScript
\u1687
Modern JavaScript since ES6
\u{1687}
JSON
\u1687
Java
\u1687
Lua
\u{1687}
Matlab
char(5767)
Perl
"\x{1687}"
PHP
\u{1687}
PostgreSQL
U&'\1687'
PowerShell
`u{1687}
Python
\u1687
Ruby
\u{1687}
Rust
\u{1687}
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