As character names:

U+018A LATIN CAPITAL LETTER D WITH HOOK character (Ɗ)

As raw characters:

Ɗ

As a string of HTML entities:

Ɗ

Decoder output:

Byte number 1 is decimal 198, hex 0xC6, octal \306, binary 11000110
This is the first byte of a 2 byte sequence.

Byte number 2 is decimal 138, hex 0x8A, octal \212, binary 10001010
This is continuation byte 1, expecting 0 more.

U+018A	LATIN CAPITAL LETTER D WITH HOOK
	* Pan-Nigerian alphabet
	* lowercase is 0257