This character is a Other Letter and is mainly used in the Hangul script.
The glyph is a canonical composition of the glyphs Glyph for U+1109Hangul Choseong Sios, Glyph for U+116EHangul Jungseong U. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+C218 forms a Korean syllable block with similar characters, which prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Su, also spelled Soo, is a rare Korean surname, a single-syllable Korean given name, and an element in many two-syllable Korean given names. As given name meaning differs based on the hanja used to write it. There are 91 hanja with the reading "su" on the South Korean government's official list of hanja which may be registered for use in given names.