As character names:

U+1FBF GREEK PSILI character (᾿)

As raw characters:

᾿

As a string of HTML entities:

᾿

Decoder output:

Byte number 1 is decimal 225, hex 0xE1, octal \341, binary 11100001
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 190, hex 0xBE, octal \276, binary 10111110
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+1FBF	GREEK PSILI
	x (modifier letter apostrophe - 02BC)
	# 0020 0313