This character is a Other Letter and is mainly used in the Han script. The Unihan Database defines it as turtle or tortoise; cuckold; Kangxi radical 213. Its Pīnyīn pronunciation is guī.
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. U+9F9C offers a line break opportunity at its position, except in some numeric contexts. The glyph can be confused with 4 other glyphs.
The Wikipedia has the following information about this codepoint:
Radical 213 meaning "turtle" is one of only two of the 214 Kangxi radicals that are composed of 16 strokes.
In the Kangxi Dictionary there are only 24 characters (out of 40,000) to be found under this radical.
In Taoist cosmology, 龜 (Polyhedron) is the nature component of the Ba gua diagram 坎 Kǎn.