As character names:

U+03A3 GREEK CAPITAL LETTER SIGMA character (Σ)

As raw characters:

Σ

As a string of HTML entities:

Σ

Decoder output:

Byte number 1 is decimal 206, hex 0xCE, octal \316, binary 11001110
This is the first byte of a 2 byte sequence.

Byte number 2 is decimal 163, hex 0xA3, octal \243, binary 10100011
This is continuation byte 1, expecting 0 more.

U+03A3	GREEK CAPITAL LETTER SIGMA
	x (latin capital letter esh - 01A9)
	x (n-ary summation - 2211)