As character names:

U+1E8C LATIN CAPITAL LETTER X WITH DIAERESIS character (Ẍ)

As raw characters:

Ẍ

As a string of HTML entities:

Ẍ

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 186, hex 0xBA, octal \272, binary 10111010
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 140, hex 0x8C, octal \214, binary 10001100
This is continuation byte 2, expecting 0 more.

U+1E8C	LATIN CAPITAL LETTER X WITH DIAERESIS
	: 0058 0308