List of just about everything that's in the header file but not in the rst file as I'm not sure which bits you normally wouldn't bother with.
Py_USING_UNICODE
Py_UNICODE_SIZE
Py_UNICODE_WIDE
Py_UNICODE_COPY
Py_UNICODE_FILL
Py_UNICODE_HIGH_SURROGATE
Py_UNICODE_LOW_SURROGATE
Py_UNICODE_MATCH
PyUnicode_WSTR_LENGTH
PyUnicode_AS_DATA
PyUnicode_IS_ASCII
PyUnicode_IS_COMPACT
PyUnicode_IS_COMPACT_ASCII
PyUnicode_IS_READY
Py_UNICODE_REPLACEMENT_CHARACTER
PyUnicode_FromString
PyUnicode_GetMax
PyUnicode_Resize
PyUnicode_InternImmortal
PyUnicode_CHECK_INTERNED
PyUnicode_FromOrdinal
PyUnicode_GetDefaultEncoding
PyUnicode_AsDecodedObject
PyUnicode_AsDecodedUnicode
PyUnicode_AsEncodedObject
PyUnicode_AsEncodedUnicode
PyUnicode_BuildEncodingMap
PyUnicode_DecodeCodePageStateful
PyUnicode_EncodeDecimal
PyUnicode_Append
PyUnicode_AppendAndDel
PyUnicode_Partition
PyUnicode_RPartition
PyUnicode_RSplit
PyUnicode_IsIdentifier
Py_UNICODE_strlen
Py_UNICODE_strcpy
Py_UNICODE_strcat
Py_UNICODE_strncpy
Py_UNICODE_strcmp
Py_UNICODE_strncmp
Py_UNICODE_strchr
Py_UNICODE_strrchr