This character is a Other Letter and is mainly used in the Hangul script.
The glyph is a canonical composition of the glyphs Glifo para U+1109Hangul Choseong Sios, Glifo para 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.
El Wikipedia tiene la siguiente información acerca de este punto de código:
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.