This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+1F5EC offers a line break opportunity at its position, except in some numeric contexts.
The Wikipedia has the following information about this codepoint:
Speech balloons (also speech bubbles, dialogue balloons, or word balloons) are a graphic convention used most commonly in comic books, comics, and cartoons to allow words (and much less often, pictures) to be understood as representing a character's speech or thoughts. A formal distinction is often made between the balloon that indicates speech and the one that indicates thoughts; the balloon that conveys thoughts is often referred to as a thought bubble or conversation cloud.
Representations
System
Representation (click value to copy)
Nº
128492
UTF-8
F0 9F 97 AC
UTF-16
D8 3D DD EC
UTF-32
00 01 F5 EC
URL-Quoted
%F0%9F%97%AC
HTML hex reference
🗬
Wrong windows-1252 Mojibake
🗬
Encoding: GB18030 (hex bytes)
94 39 FA 36
RFC 5137
\u'1F5EC'
Bash and Zsh inside echo -e
\U0001F5EC
C and C++
\U0001F5EC
C#
\U0001F5EC
CSS
\01F5EC
Excel
=UNICHAR(128492)
Go
\U0001F5EC
JavaScript
\uD83D\uDDEC
Modern JavaScript since ES6
\u{1f5ec}
JSON
\uD83D\uDDEC
Java
\uD83D\uDDEC
Lua
\u{1F5EC}
Matlab
char(128492)
Perl
"\x{1F5EC}"
PHP
\u{1f5ec}
PostgreSQL
U&'\+01F5EC'
PowerShell
`u{1F5EC}
Python
\U0001F5EC
Ruby
\u{1f5ec}
Rust
\u{1f5ec}
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