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+110CHangul Choseong Cieuc, Glyph for U+1169Hangul Jungseong O. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+C870 forms a Korean syllable block with similar characters, which prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Cho (Korean: 조, sometimes written as Jo) is a Korean family name, historically Royal family name in Korea. As of 2000, there were 1,347,730 people by this surname in South Korea, about 1% of the total population. The name may represent either of the Hanja 趙 or 曺.