This character is a Other Letter and is mainly used in the Runic 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+16DD forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Old Norse Yngvi[ˈyŋɡwe], Old High German Ing/Ingwi and Old English Ing are names that relate to a theonym which appears to have been the older name for the god Freyr. Proto-Germanic Ingwaz was the legendary ancestor of the Ingaevones, or more accurately Ingvaeones, and is also the reconstructed name of the Elder Futhark rune ᛜ and Anglo-Saxon rune ᛝ, representing ŋ.
Representations
System
Representation (click value to copy)
Nº
5853
UTF-8
E1 9B 9D
UTF-16
16 DD
UTF-32
00 00 16 DD
URL-Quoted
%E1%9B%9D
HTML hex reference
ᛝ
Wrong windows-1252 Mojibake
á›
Encoding: GB18030 (hex bytes)
81 34 B5 37
RFC 5137
\u'16DD'
Bash and Zsh inside echo -e
\u16DD
C and C++
\u16DD
C#
\u16DD
CSS
\0016DD
Excel
=UNICHAR(5853)
Go
\u16DD
JavaScript
\u16DD
Modern JavaScript since ES6
\u{16dd}
JSON
\u16DD
Java
\u16DD
Lua
\u{16DD}
Matlab
char(5853)
Perl
"\x{16DD}"
PHP
\u{16dd}
PostgreSQL
U&'\16DD'
PowerShell
`u{16DD}
Python
\u16DD
Ruby
\u{16dd}
Rust
\u{16dd}
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