As character names:

U+303F IDEOGRAPHIC HALF FILL SPACE character (〿)

As raw characters:

〿

As a string of HTML entities:

〿

Decoder output:

Byte number 1 is decimal 227, hex 0xE3, octal \343, binary 11100011
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 128, hex 0x80, octal \200, binary 10000000
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 191, hex 0xBF, octal \277, binary 10111111
This is continuation byte 2, expecting 0 more.

U+303F	IDEOGRAPHIC HALF FILL SPACE
	* visual indicator of a screen space for half of an ideograph