This character is a Other Letter and is mainly used in the Katakana script.
The glyph is not a composition. 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+30DF offers a line break opportunity at its position, except in some numeric contexts.
The Wikipedia has the following information about this codepoint:
み, in hiragana, or ミ in katakana, is one of the Japanese kana, each of which represents one mora. The hiragana is written in two strokes, while the katakana is made in three. Both represent [mi].
Representations
System
Representation (click value to copy)
Nº
12511
UTF-8
E3 83 9F
UTF-16
30 DF
UTF-32
00 00 30 DF
URL-Quoted
%E3%83%9F
HTML hex reference
ミ
Wrong windows-1252 Mojibake
ミ
Encoding: BIG5 (hex bytes)
C7 77
Encoding: BIG5HKSCS (hex bytes)
C7 DB
Encoding: CP932 (hex bytes)
83 7E
Encoding: CP949 (hex bytes)
AB DF
Encoding: CP950 (hex bytes)
C7 77
Encoding: EUC_JP (hex bytes)
A5 DF
Encoding: EUC_JIS_2004 (hex bytes)
A5 DF
Encoding: EUC_JISX0213 (hex bytes)
A5 DF
Encoding: EUC_KR (hex bytes)
AB DF
Encoding: GB2312 (hex bytes)
A5 DF
Encoding: GBK (hex bytes)
A5 DF
Encoding: GB18030 (hex bytes)
A5 DF
Encoding: HZ (hex bytes)
7E 7B 25 5F 7E 7D
Encoding: ISO2022_JP (hex bytes)
1B 24 42 25 5F 1B 28 42
Encoding: ISO2022_JP_1 (hex bytes)
1B 24 42 25 5F 1B 28 42
Encoding: ISO2022_JP_2 (hex bytes)
1B 24 42 25 5F 1B 28 42
Encoding: ISO2022_JP_2004 (hex bytes)
1B 24 42 25 5F 1B 28 42
Encoding: ISO2022_JP_3 (hex bytes)
1B 24 42 25 5F 1B 28 42
Encoding: ISO2022_JP_EXT (hex bytes)
1B 24 42 25 5F 1B 28 42
Encoding: ISO2022_KR (hex bytes)
1B 24 29 43 0E 2B 5F 0F
Encoding: JOHAB (hex bytes)
DE 6F
Encoding: SHIFT_JIS (hex bytes)
83 7E
Encoding: SHIFT_JIS_2004 (hex bytes)
83 7E
Encoding: SHIFT_JISX0213 (hex bytes)
83 7E
Adobe Glyph List
mikatakana
digraph
Mi
RFC 5137
\u'30DF'
Bash and Zsh inside echo -e
\u30DF
C and C++
\u30DF
C#
\u30DF
CSS
\0030DF
Excel
=UNICHAR(12511)
Go
\u30DF
JavaScript
\u30DF
Modern JavaScript since ES6
\u{30df}
JSON
\u30DF
Java
\u30DF
Lua
\u{30DF}
Matlab
char(12511)
Perl
"\x{30DF}"
PHP
\u{30df}
PostgreSQL
U&'\30DF'
PowerShell
`u{30DF}
Python
\u30DF
Ruby
\u{30df}
Rust
\u{30df}
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