This character is a Other Punctuation 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. The word that U+2E38 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
The Cross of Saint Peter, also known as the Petrine Cross, is an inverted Latin cross traditionally used as a Christian symbol, but in recent times, it has also been used as an anti-Christian and Satanic symbol. In Christianity, it is associated with the martyrdom of Saint Peter. The symbol originates from the Catholic tradition that when sentenced to death, Peter requested that his cross be upside down.
Representations
System
Representation (click value to copy)
Nº
11832
UTF-8
E2 B8 B8
UTF-16
2E 38
UTF-32
00 00 2E 38
URL-Quoted
%E2%B8%B8
HTML hex reference
⸸
Wrong windows-1252 Mojibake
⸸
Encoding: GB18030 (hex bytes)
81 38 F6 36
RFC 5137
\u'2E38'
Bash and Zsh inside echo -e
\u2E38
C and C++
\u2E38
C#
\u2E38
CSS
\002E38
Excel
=UNICHAR(11832)
Go
\u2E38
JavaScript
\u2E38
Modern JavaScript since ES6
\u{2e38}
JSON
\u2E38
Java
\u2E38
Lua
\u{2E38}
Matlab
char(11832)
Perl
"\x{2E38}"
PHP
\u{2e38}
PostgreSQL
U&'\2E38'
PowerShell
`u{2E38}
Python
\u2E38
Ruby
\u{2e38}
Rust
\u{2e38}
Click the star button next to each label to set this representation as favorite or remove it from the favorites. Favorites will be shown initially. (Favorites are stored locally on your computer and never sent over the internet.)