As character names:

U+1EF8 LATIN CAPITAL LETTER Y WITH TILDE character (Ỹ)

As raw characters:

Ỹ

As a string of HTML entities:

Ỹ

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 187, hex 0xBB, octal \273, binary 10111011
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 184, hex 0xB8, octal \270, binary 10111000
This is continuation byte 2, expecting 0 more.

U+1EF8	LATIN CAPITAL LETTER Y WITH TILDE
	: 0059 0303