This character is a Other Symbol and is mainly used in the Katakana script.
The glyph is a circle version of the glyph Katakana Letter O. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. This katakana joins with other adjacent katakana to form a word. U+32D4 offers a line break opportunity at its position, except in some numeric contexts.
The Wikipedia has the following information about this codepoint:
In Japanese writing, the kana お (hiragana) and オ (katakana) occupy the fifth place, between え and か, in the modern Gojūon (五十音) system of collating kana. In the Iroha, they occupy the 27th, between の and く. In the table at right (ordered by columns, from right to left), お lies in the first column (あ行, "column A") and the fifth row (お段, "row O"). Both represent [o].
Representations
System
Representation (click value to copy)
Nº
13012
UTF-8
E3 8B 94
UTF-16
32 D4
UTF-32
00 00 32 D4
URL-Quoted
%E3%8B%94
HTML hex reference
㋔
Wrong windows-1252 Mojibake
ã‹”
Encoding: EUC_JIS_2004 (hex bytes)
AC DF
Encoding: EUC_JISX0213 (hex bytes)
AC DF
Encoding: GB18030 (hex bytes)
81 39 D2 30
Encoding: ISO2022_JP_2004 (hex bytes)
1B 24 28 51 2C 5F 1B 28 42
Encoding: ISO2022_JP_3 (hex bytes)
1B 24 28 4F 2C 5F 1B 28 42
Encoding: SHIFT_JIS_2004 (hex bytes)
86 DD
Encoding: SHIFT_JISX0213 (hex bytes)
86 DD
RFC 5137
\u'32D4'
Bash and Zsh inside echo -e
\u32D4
C and C++
\u32D4
C#
\u32D4
CSS
\0032D4
Excel
=UNICHAR(13012)
Go
\u32D4
JavaScript
\u32D4
Modern JavaScript since ES6
\u{32d4}
JSON
\u32D4
Java
\u32D4
Lua
\u{32D4}
Matlab
char(13012)
Perl
"\x{32D4}"
PHP
\u{32d4}
PostgreSQL
U&'\32D4'
PowerShell
`u{32D4}
Python
\u32D4
Ruby
\u{32d4}
Rust
\u{32d4}
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