As character names:

U+1D743 MATHEMATICAL BOLD ITALIC SMALL XI character (𝝃)

As raw characters:

𝝃

As a string of HTML entities:

𝝃

Decoder output:

Byte number 1 is decimal 240, hex 0xF0, octal \360, binary 11110000
This is the first byte of a 4 byte sequence.

Byte number 2 is decimal 157, hex 0x9D, octal \235, binary 10011101
This is continuation byte 1, expecting 2 more.

Byte number 3 is decimal 157, hex 0x9D, octal \235, binary 10011101
This is continuation byte 2, expecting 1 more.

Byte number 4 is decimal 131, hex 0x83, octal \203, binary 10000011
This is continuation byte 3, expecting 0 more.

U+1D743	MATHEMATICAL BOLD ITALIC SMALL XI
	# <font> 03BE greek small letter xi