This character is a Nonspacing Mark and inherits its script property from the preceding character.
The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Nonspacing Mark. When changing direction it is not mirrored. U+0353 prohibits a line break before it.
The Wikipedia has the following information about this codepoint:
Combining Diacritical Marks is a Unicode block containing the most common combining characters. It also contains the character "Combining Grapheme Joiner", which prevents canonical reordering of combining characters, and despite the name, actually separates characters that would otherwise be considered a single grapheme in a given context. Its block name in Unicode 1.0 was Generic Diacritical Marks.
Representations
System
Representation (click value to copy)
Nº
851
UTF-8
CD 93
UTF-16
03 53
UTF-32
00 00 03 53
URL-Quoted
%CD%93
HTML hex reference
͓
Wrong windows-1252 Mojibake
◌͓
Encoding: GB18030 (hex bytes)
81 30 C4 39
AGL: Latin-5
uni0353
RFC 5137
\u'0353'
Bash and Zsh inside echo -e
\u0353
C and C++
\u0353
C#
\u0353
CSS
\000353
Excel
=UNICHAR(851)
Go
\u0353
JavaScript
\u0353
Modern JavaScript since ES6
\u{353}
JSON
\u0353
Java
\u0353
Lua
\u{353}
Matlab
char(851)
Perl
"\x{353}"
PHP
\u{353}
PostgreSQL
U&'\0353'
PowerShell
`u{353}
Python
\u0353
Ruby
\u{353}
Rust
\u{353}
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