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 Ku. 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+32D7 offers a line break opportunity at its position, except in some numeric contexts.
The Wikipedia has the following information about this codepoint:
く, in hiragana or ク in katakana, is one of the Japanese kana, which each represent one mora. Both represent [kɯ] and their shapes come from the kanji 久.
This kana may have a dakuten added, transforming it into ぐ in hiragana, グ in katakana and gu in Hepburn romanization. The dakuten's addition also changes the sound of the syllable represented, to [ɡɯ] in initial positions and varying between [ŋɯ] and [ɣɯ] in the middle of words.
A handakuten (゜) does not occur with ku in normal Japanese text, but it may be used by linguists to indicate a nasal pronunciation [ŋɯ].
In the Ainu language, the katakana ク can be written as small ㇰ, representing a final k sound as in アイヌイタㇰ Ainu itak (Ainu language). This was developed along with other extended katakana to represent sounds in Ainu that are not found in standard Japanese katakana.