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. It has a Wide East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. The glyph can, under circumstances, be confused with 4 other glyphs. In text U+9F9C behaves as Ideographic regarding line breaks. It has type Other Letter for sentence and Other for word breaks. The Grapheme Cluster Break is Any.
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.