This character is a Other Letter and is mainly used in the Tamil 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+0BB6 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
The Tamil script (தமிழ் அரிச்சுவடிTamiḻ ariccuvaṭi[tamiɻˈaɾitːɕuʋaɽi]) is an abugida script that is used by Tamils and Tamil speakers in India, Sri Lanka, Malaysia, Singapore, Indonesia and elsewhere to write the Tamil language. It is one of the official scripts of the Indian Republic. Certain minority languages such as Saurashtra, Badaga, Irula and Paniya are also written in the Tamil script.
Representations
System
Representation (click value to copy)
Nº
2998
UTF-8
E0 AE B6
UTF-16
0B B6
UTF-32
00 00 0B B6
URL-Quoted
%E0%AE%B6
HTML hex reference
ஶ
Wrong windows-1252 Mojibake
ஶ
Encoding: GB18030 (hex bytes)
81 32 94 32
RFC 5137
\u'0BB6'
Bash and Zsh inside echo -e
\u0BB6
C and C++
\u0BB6
C#
\u0BB6
CSS
\000BB6
Excel
=UNICHAR(2998)
Go
\u0BB6
JavaScript
\u0BB6
Modern JavaScript since ES6
\u{bb6}
JSON
\u0BB6
Java
\u0BB6
Lua
\u{BB6}
Matlab
char(2998)
Perl
"\x{BB6}"
PHP
\u{bb6}
PostgreSQL
U&'\0BB6'
PowerShell
`u{BB6}
Python
\u0BB6
Ruby
\u{bb6}
Rust
\u{bb6}
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