As character names:

U+1D78D MATHEMATICAL SANS-SERIF BOLD PHI SYMBOL character (𝞍)

As raw characters:

𝞍

As a string of HTML entities:

𝞍

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 158, hex 0x9E, octal \236, binary 10011110
This is continuation byte 2, expecting 1 more.

Byte number 4 is decimal 141, hex 0x8D, octal \215, binary 10001101
This is continuation byte 3, expecting 0 more.

U+1D78D	MATHEMATICAL SANS-SERIF BOLD PHI SYMBOL
	# <font> 03D5 greek phi symbol